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Chorda dorsalis definition

In amphibians and fishedit

la Hac chorda, Wagner revera provocavit sonum vel structuram harmoniae musicae ut potentior fieri potest quam sua functio—notio quae mox a Debussy et aliis explorata est. WikiMatrix en With this chord , Wagner actually provoked the sound or structure of musical harmony to become more predominant than its function, a notion that was soon. Chordee is a congenital condition (birth defect) resulting from abnormal development of the penis.. In chordee, the penis usually curves downward. The urinary opening may be on the underside of.

Post-embryonic retentionedit

Notochord, notochord (chorda dorsalis) Somewhat flexible, rod-like structure, composed of disc-like, turgid cells, which extends virtually the entire length of Larva, A larva is the name of the stage between hatching and adulthood in the life cycle of some invertebrates (animals without a backbone). A sexually imm CSB - Chord Selection Button. Looking for abbreviations of CSB? It is Chord Selection Button. Chord Selection Button listed as CSB. Chord Selection Button - How is Chord Selection Button abbreviated? chorda dorsalis; chorda gubernaculum; chorda gubernaculum; chorda magna; chorda magna; chorda obliqua; chorda obliqua; chorda obliqua. urochord: The caudal chord of an ascidian or tunicate, likened to the notochord, chorda dorsalis, or dorsal chord of a vertebrate; the central axis of the appendage of certain adult tunicates, as an appendicularian, and the corresponding structure of embryonic or larval tunicates in general Nerve cord definition, a single hollow tract of nervous tissue that constitutes the central nervous system of chordates and develops into the spinal cord and brain in vertebrates. See more

CHORDA meaning in the Cambridge English Dictionar

  1. Chordate nerve chord is hollow, dorsal, end usually enlarged to form brain. from ectodermal ridge on top of body. Term: Pharyngeal Pouches or slits Definition: Lead from pharyngeal cavity to outside. Give rise to several structures later in evolutionary development: glands, sinuses, jaws, ears Evolved as a filter feeding apparatus, gills come.
  2. Notogenesis is the development of the notochord by epiblasts that form the floor of the amnion cavity.[4] The progenitor notochord is derived from cells migrating from the primitive node and pit.[5] The notochord forms during gastrulation and soon after induces the formation of the neural plate (neurulation), synchronizing the development of the neural tube. On the ventral aspect of the neural groove an axial thickening of the endoderm takes place. (In bipedal chordates, e.g. humans, this surface is properly referred to as the anterior surface). This thickening appears as a furrow (the chordal furrow) the margins of which anastomose (come into contact), and so convert it into a solid rod of polygonal-shaped cells (the notochord) which is then separated from the endoderm.[citation needed]
  3. notochord: [ no´to-kord ] a cylindrical cord of cells on the dorsal aspect of an embryo, marking its longitudinal axis; the common factor of all chordates . It is the center of development of the axial skeleton
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  5. Definition of chordata in the Definitions.net dictionary. Meaning of chordata. What does chordata mean? Information and translations of chordata in the most comprehensive dictionary definitions resource on the web

CHORDA definition in the Cambridge English Dictionar

Examples of dorsal nerve cord in the following topics: Characteristics of Chordata. Animals in the phylum Chordata share four key features: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.; It is located between the digestive tube and the nerve cord, providing skeletal support through the length of the body.; The dorsal hollow nerve cord derives from ectoderm. http://www.theaudiopedia.com What is DORSAL NERVE CORD? What does DORSAL NERVE CORD mean? DORSAL NERVE CORD meaning - DORSAL NERVE CORD definitio..

Looking for abbreviations of CNESS? It is Chord-Normalized Expected Species Shared Index. Chord-Normalized Expected Species Shared Index listed as CNESS. Chord-Normalized Expected Species Shared Index - How is Chord-Normalized Expected Species Shared Index abbreviated? Definition; CNESS: Chord-Normalized Expected Species Shared Index. What does Chordata mean? Chordata is defined by the lexicographers at Oxford Dictionaries as A large phylum of animals that includes the vertebrates together with the sea squirts and lancelets.. The notochord plays a key role in signaling and coordinating development. Embryos of modern vertebrates form transient notochord structures during gastrulation. The notochord is found ventral to the neural tube. Forms the anterolateral system with smaller tracts- passes up anterior and lateral columns of spinal cord- carries signals for pain, temperature, pressure, tickle, itch, and light touch- first order neurons end in dorsal horn of spinal cord near point of entry- synapse with second order neuron which decussate to opposite side of spinal cord and form this tract- these fibers lead all the way to.

Notochord definition of notochord by Medical dictionar

Spinal cord compression occurs when a mass places pressure anywhere on the spinal cord down to the lower back. Learn more about it With Reverso you can find the English translation, definition or synonym for chorda dorsalis and thousands of other words. You can complete the translation of chorda dorsalis given by the English-French Collins dictionary with other dictionaries such as: Wikipedia, Lexilogos, Larousse dictionary, Le Robert, Oxford, Gréviss Both notochord and nerve cord is from the neck to the tail in the dorsal part of the body. Notochord is a skeletal rod, and nerve cord is a solid strand of nervous tissue 1 Definition. Die Chorda dorsalis ist eine temporäre embryonale Struktur, die vom Mesoderm abgeschnürt wird und eine Rolle bei der Induktion des Neuroektoblasten sowie der Entstehung der Wirbelkörper und der Bandscheibenkerne (Nucleus pulposus) spielt. 2 Embryologie. Die Chorda dorsalis bildet sich aus der Chordaplatte

Expressions []. a casa d'un penjat no hi anomenis cordes; tant s'estira la corda, que a la fi es trenca; Further reading [] corda in Diccionari de la llengua catalana, segona edició, Institut d'Estudis Catalans. corda in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana. corda in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua Medical Definition of chorda: cord sense 2 specifically: notochord. Learn More about chorda. Share chorda. Post the Definition of chorda to Facebook Share the Definition of chorda on Twitter. Dictionary Entries near chorda. chondrus. Chopart's joint. chord. chorda. chordal. chordamesoderm. Chordata

findings in a patient with subacute combined degeneration of the spinal cord, a complication of vitamin B12 deficiency, and a rare cause of demyelination of the dorsal and lateral columns of the spinal cord. Initial study showed high intensity in the dorsal columns of the cervical and thoracic spinal cord on T2-weighted image The notochord is a major regulator of embryonic patterning in vertebrates and abnormal notochordal development is associated with a variety of birth defects in man. Proper knowledge of the development of the human notochord, therefore, is important to understand the pathogenesis of these birth defects. Textbook descriptions vary significantly and seem to be derived from both human and animal. The dorsal nerve cord is one of the embryonic features unique to chordates, along with a notochord, a post-anal tail and pharyngeal slits. It is a hollow cord dorsal to the notochord. It is formed. A flexible rodlike structure that forms the main support of the body in the lowest chordates; a primitive spine· A similar structure found in the embryos of vertebrates from which the spine develop

ADVERTISEMENTS: Useful Notes on Gastrulation in Frog! Gastrulation in Frog: Gastrulation in the process of highly integrated cell and tissue migrations of prospective endodermal and mesodermal areas to their definite positions into the interior of the embryo. These movements are self determined and interdependent and are termed morphogenetic movements, creating new relationships and ultimately. Please set a username for yourself. People will see it as Author Name with your public flash cards. chorda definition: Proper noun Chorda ? 1. A taxonomic genus within the family Chordaceae.. The heart existed as a simple pulsating vessel; and the chorda dorsalis took the place of a vertebral column.

Chorda dorsalis - definition of Chorda dorsalis by The

Chorda dorsalis synonyms, Chorda dorsalis pronunciation, Chorda dorsalis translation, English dictionary definition of Chorda dorsalis. See Notochord. See also: Chorda Definition of notochord in the Definitions.net dictionary. Meaning of notochord. What does notochord mean? Information and translations of notochord in the most comprehensive dictionary definitions resource on the web By the age of 4, all notochord residue is replaced by a population of chondrocyte-like cells of unclear origin.[8] Persistence of notochordal cells within the vertebra may cause a pathologic condition: persistent notochordal canal.[9] If the notochord and the nasopharynx do not separate properly duning embryonic development, a depression (Tornwaldt bursa) or Tornwaldt cyst may form.[10] The cells are the likely precursors to a rare cancer called chordoma.[11] Incomplete spinal cord syndromes are caused by lesions of the ascending or descending spinal tracts that result from trauma, spinal compression, or occlusion of spinal arteries. Central cord syndrome, anterior cord syndrome, posterior cord syndrome, and Brown-Séquard syndrome are the most common types of incomplete spinal cord syndromes. In contrast to a complete spinal cord injury, lesions. Chordata (kôrdā`tə, -dä`-), phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development.Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals

Epidural lipomatosis is a rare entity to cause spinal cord compression and neurological deficits. This is usually associated with excess of steroids in the body either because of endogenous source as in Cushings disease or exogenous intake as in some diseases like systemic lupus erythematosus, in some endocrinopathies or in morbid obesity A hollow dorsal nerve chord-This is formed from the ectoderm and runs the length of the body. In vertebrates, this makes up the central nervous system. A post-anal tail. A tail that extends beyond the anus in at least some point of their development. Pharyngeal gill slits in at least some point of their development. [ Die Chorda dorsalis (Rückensaite; von lateinisch chorda Saite und dorsum Rücken) oder auch Notochord, Achsenstab, selten Urwirbelsäule und häufig schlicht Chorda, ist das ursprüngliche innere Achsenskelett aller Chordatiere (Chordata) und für sie das namensgebende Merkmal.Die Chorda dorsalis ist ein langer, dünner und biegsamer Stab im Rückenbereich

Within Amphioxusedit

The notochord of the lancelet protrudes beyond the anterior end of the neural tube. This projection serves a second purpose in allowing the animal to burrow within the sediment of shallow waters. There, Amphioxus serves as a filter feeder and spends most of its life partially submerged within the sediment.[3] Placement of a permanent dorsal root ganglion neurostimulator may be considered medically necessary when the above medical necessity criteria for a trial dorsal root ganglion neurostimulator are met, and there is demonstration of at least a 50% reduction in pain with at least a 3-day trial of temporary dorsal root ganglion stimulatio wird durch die Chorda dorsalis induziert. Diese Ursegmente sind nicht mit den Wirbelkörpern des ausgewachsenen Menschen gleichzusetzen. Letztere entstehen genau zwischen zwei Somiten. Es gibt 4 okzipitale, 8 zervikale, 12 thorakale, 5 lumbale, 5 sakrale und ca. 8 kokzygeale Somitenpaare

chordae tendineae definition from the mondofacto online medical dictionar Human nervous system - Human nervous system - The spinal cord: The spinal cord is an elongated cylindrical structure, about 45 cm (18 inches) long, that extends from the medulla oblongata to a level between the first and second lumbar vertebrae of the backbone. The terminal part of the spinal cord is called the conus medullaris. The spinal cord is composed of long tracts of myelinated nerve. Definition. Spinal cord compression (SCC) results from processes that compress or displace arterial, venous, and cerebrospinal fluid spaces, as well as the cord itself. This can occur as a result of extrinsic causes and lesions, or intrinsic aetiologies of the cord substance. Examples include trauma or tumour affecting the cord substance, and.

Chorda-dorsalis dictionary definition chorda-dorsalis

chordate - WordReference English dictionary, questions, discussion and forums. All Free Concomitantly with the development of this canal, there is found, immediately beneath it, a little gelatinous rod enclosed in a membraneous envelope, and called the notochord, or chorda dorsalis. The Common Frog. Amphioxus has only a primitive proto-spinal column called a notochord, but it is a very close relative of vertebrates. NPR Topics: New

The notochord secretes a protein called sonic hedgehog (SHH), a key morphogen regulating organogenesis and having a critical role in signaling the development of motor neurons.[12] The secretion of SHH by the notochord establishes the ventral pole of the dorsal-ventral axis in the developing embryo. definition of notochord Sentences Mobile. The chorda-mesoderm develops into the notochord. In the middle of the dorsal surface of the embryo is a linear structure called the notochord. It had a primitive notochord, a structure that could have developed into a vertebral column later The white matter at the cord's periphery contains ascending and descending tracts of myelinated sensory and motor nerve fibers. The central H-shaped gray matter is composed of cell bodies and nonmyelinated fibers (see figure Spinal nerve).The anterior (ventral) horns of the H contain lower motor neurons, which receive impulses from the motor cortex via the descending corticospinal.

Chorda tympani - definition of Chorda tympani by The Free

Chordata (o le chordatos, le nomine scientific Chordata) es un typo zoologic characterisate per le presentia de un chorda neural tubular dorsal o notochordo, sia durante tote le disveloppamento, sia in alicunes del phases de lor vita.Il ha tres subphylos e tres subtypos: craniatos (que include le vertebratos), urochordatos, e cephalochordatos Tethered cord syndrome is a stretch-induced functional disorder associated with the fixation (tethering) effect of inelastic tissue on the caudal spinal cord, limiting its movement. This abnormal attachment is associated with progressive stretching and increased tension of the spinal cord as a child ages, potentially resulting in a variety of. Dorsal vs Ventral • Dorsal is the backside while ventral is the opposite of backside. • When a particular organ (A) is ventral to another (B), the organ-B lies dorsal to the organ-A. • Ventral side bears more external organs than the dorsal side usually does. • Usually, the dorsal side is hardy while the ventral side is tender The dorsal nerve cord is a unique feature to chordates, and it is mainly found in the Vertebrata chordate subphylum.The dorsal nerve cord is only one embryonic feature unique to all chordates, among the other four chordate features-- a notochord, a post-anal tail, an endostyle, and pharyngeal slits.The dorsal hollow nerve cord is a hollow cord dorsal to the notochord

Ataxia maybe inherited and caused by a genetic defect or it may be acquired due to structural damage to the cerebellum or spinal cord. Genetic ataxia may be sex linked, meaning that the DNA and gene problem is located on an X or Y chromosome (the sex chromosomes) or it may be autosomal linked, where the abnormality is located on one of the other 23 pairs of chromosomes The phylum Chordata is a strange phylum in that it contains three subphyla, two of which contain invertebrates while the third contains all the animals we are most familiar with, the vertebrates. After a brief introduction I will deal with each subphylum individually

Notochord - Wikipedi

  1. Spinal cord stimulation (SCS) is a pain management strategy designed for patients with chronic pain (eg, neuropathic pain) that is refractory to medication and alternative or adjunct therapies, or who have experienced failed back surgery.1-3 The current literature suggests that psychological factors such as somatization, depression, anxiety, and poor coping are important predictors of poor.
  2. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
  3. es whether increased pressure in the core will result in shortening and thickening versus lengthening and thinning.[2]
  4. Leukoplakia appears as thick, white patches on the inside surfaces of your mouth. It has a number of possible causes, including repeated injury or irritation. It can also be a sign of precancerous changes in the mouth or mouth cancer. With leukoplakia (loo-koh-PLAY-key-uh), thickened, white patches form on your gums, the insides of your cheeks.
  5. Les chordés, aussi orthographiés cordés, sont un embranchement des triploblastiques deutérostomiens caractérisés par la présence d'une chorde ou notocorde. Cette structure rigide en.

Chorda Definition of Chorda at Dictionary

  1. Notochord definition is - a longitudinal flexible rod of cells that in the lowest chordates (such as a lancelet or a lamprey) and in the embryos of the higher vertebrates forms the supporting axis of the body
  2. Die Chorda dorsalis (Rückensaite; von lat. chorda bzw. griech. chorde Darm, Darmsaite und lat. dorsum Rücken), auch Notochord oder Achsenstab genannt, ist das ursprüngliche, mesodermale, innere Achsenskelett aller Chordatiere und ist für diese das namensgebende Merkmal. Sie befindet sich als elastischer Stab bei ursprünglichen Chordatieren wie den Lanzettfischchen.
  3. chorda-dorsalis definition: Noun 1. (anatomy) notochordOrigin Latin..

Struna hřbetní (chorda dorsalis, též notochord) je společný znak strunatců.Vzniká z entodermu, tzv. chordomezodermu, a tvoří ji pružná chondroidní tkáň, která připomíná chrupavku.Během embryonálního vývoje se jedná o významné indukční centrum, jelikož stimuluje vývoj osových součástí zárodku A postembryonic vestige of the notochord is found in the nucleus pulposus of the intervertebral discs. Isolated notochordal remnants may escape their lineage-specific destination in the nucleus pulposus and instead attach to the outer surfaces of the vertebral bodies, from which notochordal cells largely regress.[6] MRI of Spine lumbar wo Contrast In August I started having a quick fluttering feeling in my lower right front quandrant area with back pain and/or pain shooting into my female organ area. Dr. went from baldder/kidney infection to appendix to cyst on ovaries and finally decided perhaps it was a pinched nerve and sent me to PT The Spinal Cord is the thin, tubular bundle of nervous tissue and support cells that runs from the head to the lumbar region of the vertebral column. Simply put, it is the one long bone that you can feel at the center of your back. The human brain and spinal cord together comprise a system that is crucial for the survival of human beings; the.

Phylum chordata and protochordates

notochord [no´to-kord] a cylindrical cord of cells on the dorsal aspect of an embryo, marking its longitudinal axis; the common factor of all chordates. It is the center of development of the axial skeleton. no·to·chord (nō'tō-kōrd), 1. In primitive vertebrates, the primary axial supporting structure of the body, derived from the notochordal or. The spinal cord is a continuation of the brainstem.It extends from the foramen magnum at the base of the skull to the L1/L2 vertebra where it terminates as the conus medullaris (medullary cone). A thin thread called filum terminale extends from the tip of the conus medullaris all the way to the 1st coccygeal vertebra (Co1) and anchors the spinal cord in place

Chorda dorsalis Article about chorda dorsalis by The

MRI findings are typical, with the herniation in all cases being in an antero-lateral or anterior position. It remains unknown why this occurs in an anterior rather than posterior direction. On sagittal sections, an anterior C-shaped kink of the cord can be seen, with secondary expansion of the dorsal subarachnoid space The notochord represents the earliest fetal axial skeleton, extending from the Rathke pouch to the coccyx.It is a primitive cell line from which the skull base and vertebral column develop. The notochord is cylindrical and is replaced by sclerotomes that produce cartilage, and subsequently bone In anatomy, the notochord is a flexible rod formed of a material similar to cartilage.If a species has a notochord at any stage of its life cycle, it is, by definition, a chordate.In vertebrates, the notochord develops into the vertebral column [citation needed].The notochord lies along the anteroposterior (head to tail) axis, is usually closer to the dorsal than the ventral surface of the.

Chorda dorsalis Definition of Chorda dorsalis by Webster

Chorda definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Look it up now Both notochord and nerve cord is from the neck to the tail in the dorsal part of the body. Notochord is a skeletal rod, and nerve cord is a solid strand of nervous tissue. The main difference between notochord and nerve cord is that notochord belongs to the skeleton whereas nerve cord belongs to the central nervous system of chordates

Notochord \Noto*chord\, n. [Gr. nw^ton the back + E. chord.] (Anat.) An elastic cartilagelike rod which is developed beneath the medullary groove in the vertebrate embryo, and constitutes the primitive axial skeleton around which the centra of the vertebr[ae] and the posterior part of the base of the skull are developed; the chorda dorsalis Chordata definition: a phylum comprising true vertebrates and animals having a notochord. Type of: phylum. a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail for at least some period of their life cycles. Chordata. Origin: Latin chorda (chord, catgut, string) en .wiktionary .org /wiki /Chordata Chordate Definition: any animal of the phylum Chordata, including the vertebrates and protochordates ,... | Bedeutung, Aussprache, Übersetzungen und Beispiel

What does notochord mean? notochord is defined by the lexicographers at Oxford Dictionaries as A cartilaginous skeletal rod supporting the body in all embryonic and some adult chordate animals In vertebrates, it extends throughout the entire length of the future vertebral column, and reaches as far as the anterior end of the midbrain, where it ends in a hook-like extremity in the region of the future dorsum sellae of the sphenoid bone. Initially, it exists between the neural tube and the endoderm of the yolk-sac; soon, the notochord becomes separated from them by the mesoderm, which grows medially and surrounds it. From the mesoderm surrounding the neural tube and notochord, the skull, vertebral column, and the membranes of the brain and medulla spinalis are developed.[citation needed]

Chorda dictionary definition chorda define

  1. Noriyuki Satoh, in Chordate Origins and Evolution, 2016. 9.2.1 The Dorsal Collar Cord. Various authors have proposed ventral and dorsal collar cords as possible homologous structures of the chordate dorsal nerve cord, with the internalized collar cord having attracted the most attention.Although early reports suggested that the dorsal cord was simply a conduit for axons, recent studies.
  2. the elastic, unsegmented skeletal axis in chordate animals and in man. In some chordate animals, the notochord is retained throughout life. These include such tunicates as the Appendicularia, such acraniates as the lance lets, and such vertebrates as the cyclostomates.Fishes in which the notochord is retained throughout life include the holocephalans, chondrosteans, and dipnoans
  3. Spina bifida is a birth defect that occurs when the spine and spinal cord don't form properly. It's a type of neural tube defect. The neural tube is the structure in a developing embryo that eventually becomes the baby's brain, spinal cord and the tissues that enclose them. Normally, the neural tube forms early in pregnancy and it closes by the.
  4. Notochord Function The strength of the notochord makes it a very useful structure to attach muscles to. Muscles need places for attachment in order to flex properly. By attaching muscles down the length of the notochord, small invertebrates can use muscles all over their body to swim.. notochord Source: Noland, George B. 1983
  5. Tabes dorsalis: Slowly progressive degeneration of the spinal cord that occurs in the tertiary (third) phase of syphilis a decade or more after originally contracting the infection. Among the terrible features of tabes dorsalis are lancinating lightning-like pain, ataxia (wobbliness), deterioration of the nerves to the eyes (the optic nerves) leading to blindness, urinary incontinence, loss of.
  6. By its definition, the nerve cord is a hollow fluid-filled structure, which is the dorsal tract of the nervous tissue. It is a characteristic feature of chordates. The nerve cord naturally develops in the brain and spinal cord of vertebrate organisms. In invertebrates, the nerve cord is present only in some phyla
  7. e scientific Chordata) es un typo zoologic characterisate per le presentia de un chorda neural tubular dorsal o notochordo, sia durante tote le disveloppamento, sia in alicunes del phases de lor vita.Il ha tres subphylos e tres subtypos: craniatos (que include le vertebratos), urochordatos, e cephalochordatos. Essayos que divina le relationes evolutionari del.

Dorsal nerve cord - Wikipedi

Notochord Radiology Reference Article Radiopaedia

Chordate definition: any animal of the phylum Chordata, including the vertebrates and protochordates ,... | Meaning, pronunciation, translations and example 1. How to use chorda in a sentence. Example sentences with the word chorda.chorda example sentences.chorda Sentence Examples. A remnant of the chorda dorsalis and its sheath persists as the ligamentum suspensorium between the central portions of the successive vertebrae. 0. 0. 2. Chordae in a sentence - Use chordae in a sentence 1. -Other tendinous tissues known to express Tnmd are the. Chorda dorsalis explanation. Define Chorda dorsalis by Webster's Dictionary, WordNet Lexical Database, Dictionary of Computing, Legal Dictionary, Medical Dictionary, Dream Dictionary Looking for definition of Chore? Chore explanation. Define Chore by Webster's Dictionary, WordNet Lexical Database, Dictionary of Computing, Legal Dictionary, Medical Dictionary, Dream Dictionary. Chord of an arch Chord of curvature Chorda Chorda dorsalis Chordal chordamesoderm Chordata chordat

Chorda Dorsalis (notochord), bij vissen boven de ruggemergstreng gelegen staafvormige, gelatineuze massa met stevige membraan, die zich over de hele lengte van het dier uitstrekt en steun geeft weke delen en aanhechtingsmogelijkheid biedt aan de spieren The dorsal nerve cord is one of the embryonic features unique to chordates, along with a notochord, a post-anal tail, an endostyle, and pharyngeal slits.The dorsal nerve cord is a hollow cord dorsal to the notochord. It is formed from a part of the ectoderm that rolls, forming the hollow tube, compared to other animal phyla, which have solid, ventral tubes In his criticism of the vertebral theory of the skull, Vogt started by defining the vertebra as a ring formed round the chorda. Medical Definition of Chorda spinalis. 1. Elongated, approximately cylindrical part of the central nervous system of vertebrates that lies in the vertebral canal and from which the spinal nerves emerge. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008) Lexicographical Neighbors of Chorda Spinali

chorda dorsalis translation French English-French

  1. Definition and Basic Sciences. The spinal cord is a continuation of the central nervous system and starts at C1, which is just below the medulla of the brainstem and extends down to the level of the space between the first and second lumbar vertebrae where it becomes the conus medullaris. Blood supply is via: Vertebral arteries that form one anterior and two posterior spinal arteries
  2. Mostly marine, soft, unsegmented, triploblastic body having bilateral symmetry. Developed coelom and possess notochord only in embryonic stage. Body has three distinct parts i.e., proboscis, collar and trun
  3. Characteristics Of Phylum Chordata. Phylum Chordata possesses the following characteristic features: Notochord. It is a longitudinal, cartilaginous rod running between the nerve cord and the digestive tract. It acts as a support for the nerve cord and is replaced by the vertebral column after the embryonic stage in all vertebrates. Dorsal Nerve.

la Hac chorda, Wagner revera provocavit sonum vel structuram harmoniae musicae ut potentior fieri potest quam sua functio—notio quae mox a Debussy et aliis explorata est. WikiMatrix en With this chord, Wagner actually provoked the sound or structure of musical harmony to become more predominant than its function, a notion that was soon. When at the upper side, it is a top chord, and is in compression; when at the lower edge, it is a lower chord, and is in tension. n chord In anatomy, a cord; a chorda; especially, the notochord, or chorda dorsalis. See chorda. chord To furnish with chords or strings, as a musical instrument. chord In music, to sound harmoniously or concordantl

The most commonly cited functions of the notochord are: as a site of muscle attachment, as a vertebral precursor, and as a midline tissue that provides directional signals to surrounding tissue during development.[1] Notochords are thought to be advantageous through providing a rigid yet flexible structure for muscle attachment. In some chordates, it persists throughout life as the main structural support of the body, while in most vertebrates it develops into the nucleus pulposus of the intervertebral disc.[1] 1. How to use chorda in a sentence. Example sentences with the word example Sentence Examples. A remnant of the chorda dorsalis and its sheath persists as the ligamentum suspensorium between the central portions of the successive vertebrae. 0. 0. 2. chordae in a sentence - Use chordae in a sentence 1. -Other tendinous tissues known to express. Chorda dorsalis, Chorda, Rückensaite, Achsenstab, bei den Chordatieren (Chordata) ein den Körper zwischen Neuralrohr und Darm längs durchziehender elastischer Strang aus spezialisierten Zellen, die von einer Bindegewebshülle, der Chordascheide, umgeben sind. Bei Wirbeltieren (Vertebrata. Chordate Definition. A chordate is an animal that belongs to the phylum Chordata, which is part of the Deuterostomes kingdom.Organisms in the Deuterostomes kingdom have a distinct characteristic: their anus develops before their mouth in early embryonic stages With Reverso you can find the English translation, definition or synonym for chorda tympani nerve and thousands of other words. You can complete the translation of chorda tympani nerve given by the English-French Collins dictionary with other dictionaries such as: Wikipedia, Lexilogos, Larousse dictionary, Le Robert, Oxford, Gréviss

Spinal Epidural Lipomatosis (SEL) is a rare benign disorder that occurs against a background of abnormal hormone levels or steroids in the body. It causes spinal cord compression in the lumbar or thoracic region, with accompanying neurological signs and symptoms. The steroids may be externally administered to treat an underlying disorder, or. The dorsal nerve cord and the notochord are two very different types of tissue. The dorsal nerve cord develops from ectoderm which becomes nervous tissue during embryonic development. The notochord develops from mesoderm (the embryonic source of c.. A syrinx is a fluid-filled cavity within the spinal cord (syringomyelia) or brain stem (syringobulbia). Predisposing factors include craniocervical junction abnormalities, previous spinal cord trauma, and spinal cord tumors. Symptoms include flaccid weakness of the hands and arms and deficits in pain and temperature sensation in a capelike. Thoracic spondylosis refers to a weakening of the middle of your spine. This can be due to wear and tear, stress fractures, or injuries. We'll tell you what you can do to get relief, as well as.

Chorda Medical Definition Merriam-Webster Medical Dictionar

The dorsal tips of the neural groove become fused with each other and a neural tube is formed. The cavity within the neural tube is called neurocoel. In the invertebrate chordates the dorsal tubular nerve cord remains almost unchanged, but in the verte­brates the anterior region of the nerve cord becomes specialised into the brain and the. A very small species (L. pusillus) with tufted green fronds grows parasitic on the fronds of Chorda and the stems of Laminaria. Chorda tympani synonyms, Chorda tympani pronunciation, Chorda tympani translation, English dictionary definition of Chorda tympani. n a cord-like formation in the body. Chorda tympani - definition of Chorda tympani by The Free Dictionary chorda; Chorda dorsalis; Chorda tympani; chordal; chordamesoderm; Chordata; chordate; chordate family. Multiple sclerosis is an autoimmune disease that causes demyelinization of nerve coverings over parts of the brain and spinal cord 2 3 5. Multiple sclerosis, or MS, affects women more often than men, and usually occurs between the ages of 20 and 40, notes the Merck Manuals Online Medical Library 1 2 3.Demyelinization, which slows or stops nerve impulses, affects the spinal cord in 75 percent.

The dorsal hollow nerve cord derives from ectoderm that rolls into a hollow tube during development. In chordates, it is located dorsally (at the top of the animal) to the notochord. In contrast to the chordates, other animal phyla are characterized by solid nerve cords that are located either ventrally or laterally The posterior (dorsal) horns contain sensory fibers that originate in cell bodies in the dorsal root ganglia. The gray matter also contains many internuncial neurons that carry motor, sensory, or reflex impulses from dorsal to ventral nerve roots, from one side of the cord to the other, or from one level of the cord to another

A postanal tail is an extension of the spinal chord that extends beyond the animal's anus. Postanal tails are a feature of all chordates, which is a phylum that includes vertebrates. All chordates have a postanal tail at some point, but they may not have that tail for their entire lives Chorda-mesoderm is the layer formed by invagination cells from the region of the dorsal blastoporal lip, which form the roof of archenteron. Mangold (1927) selected a small part of dorsal blastoporal lip from an early gastrula of Triturus cristatus and grafted it at a place near the lateral lip of the blastopore of the host gastrula of T. Definition from Wiktionary, the free dictionary. Jump to navigation Jump to search. English [] Etymology []. Latin. Noun []. chorda dorsalis notocho

Several species of lancelets, or amphioxi, small, fishlike, filter-feeding animals found in shallow water. A lancelet has a long body, pointed at both ends, with a large notochord that extends almost from tip to tip and is present throughout its life In most vertebrates, the notochord develops into secondary structures. In other chordates, the notochord is retained as an essential anatomical structure. Dorsal Root Ganglion Definition Within the peripheral nervous system, there are special nerve cell clusters called dorsal root ganglia that help transmit the sensory messages of pain and touch Tabes dorsalis is a form of neurosyphilis, which is a complication of late stage syphilis infection.Syphilis is a bacterial infection that is spread sexually. When syphilis is untreated, the bacteria damages the spinal cord and peripheral nervous tissue. This leads to the symptoms of tabes dorsalis tendinous cords --> chordae tendineae: medical dictionary: Thread-like bands of fibrous tissue which attach on one end to the edges of the tricuspid and mitral valves and on the other to the papillary muscles. (12 Dec 1998

Which group of cells in the dorsal horn of the spinal chord is responsible for modulating the nature of an experienced painful stimulus? Definition The Substantia Gelatinosa, with its many inhibitory interneurons that project to Nucleus proprius and other levels of the spinal chord During development of amphibians and fish, the notochord induces development of the hypochord through secretion of vascular endothelial growth factor. The hypochord is a transient structure ventral to the notochord, and is primarily responsible for correct development of the dorsal aorta.[7]

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