Dorsal root
Information about Dorsal root
) | |
| The formation of the spinal nerve from the dorsal and ventral roots | |
| Latin | radix posterior |
| subject #208 916 | |
| MeSH | Dorsal+Roots |
| Dorlands/Elsevier | r_12/12709389 |
At the distal end of the dorsal root is the dorsal root ganglion, which contains the neuron cell bodies of the nerve fibres conveyed by the root.
If the dorsal root of a spinal nerve were severed it would lead to numbness in certain areas of the body.
Additional images
) Cervical vertebra | ) Medulla spinalis | ) The mechanism of the reflex arc | A spinal nerve with its anterior and posterior roots. |
) The sensory tract. | ) Diagrammatic transverse section of the medulla spinalis and its membranes. | A portion of the spinal cord, showing its right lateral surface. The dura is opened and arranged to show the nerve roots. | ) Scheme showing structure of a typical spinal nerve. |
See also
External links
- SUNY Figs 02:04-06 - "Superior view of a section through the spinal cord within the vertebral foramen."
- Anatomy Atlases - Microscopic Anatomy, plate 06.114 - "Spinal Root Nerve Fibers"
Anatomy of torso (primarily): the spinal cord | |
|---|---|
| Spinal nerve | Dorsal (Root, Ganglion, Ramus) • Ventral (Root, Ramus) • Sympathetic trunk • rami communicantes (Gray, White) |
| Gray matter/Rexed laminae | Posterior horn (Column of Clarke, Substantia gelatinosa of Rolando, Nucleus proprius) • Lateral horn • Anterior horn • Central canal/Substantia gelatinosa centralis |
| White matter: somatic/ascending (blue) | |
| White matter: motor/descending (red) |
Lateral: Corticospinal (Lateral) • Ep (Rubrospinal, Olivospinal)
Anterior: Corticospinal (Anterior) • Ep (Vestibulospinal, Tectospinal, Reticulospinal)
|
| Layers | Epidural space • Dura mater • Subdural space • Arachnoid mater • Subarachnoid space • Pia mater |
| Other structures | Denticulate ligaments • Conus medullaris • Cauda equina • Filum terminale • Cervical enlargement • Lumbar enlargement • Anterior median fissure |
Latin}}}
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
..... Click the link for more information.
Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. Created and updated by the United States National Library of Medicine (NLM), it is used by the MEDLINE/PubMed
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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Anatomy (from the Greek ἀνατομία anatomia, from ἀνατέμνειν
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Neurology is a branch of medicine dealing with disorders of the nervous system. Medical professionals (such as Biomedical Doctors and Physicians) specializing in the field of neurology are called neurologists
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afferent neurons--otherwise known as sensory or receptor neurons--carry nerve impulses from receptors or sense organs toward the central nervous system. This is the case vice versa as well. This term can also be used to describe relative connections between structures.
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Somatic sensation consists of the various sensory receptors that trigger the experiences labelled as touch or pressure, temperature (warm or cold), pain (including itch and tickle), and the sensations of muscle movement and joint position including posture, movement, and facial
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The term spinal nerve generally refers to the mixed spinal nerve, which is formed from the dorsal and ventral roots that come out of the spinal cord. The spinal nerve is the bit that passes out of the vertebrae through the intervertebral foramen.
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In anatomy and neurology, the dorsal root ganglion (or spinal ganglion) is a nodule on a dorsal root that contains cell bodies of neurons in afferent spinal nerves.
The axons of dorsal root ganglion neurons are known as afferents.
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The axons of dorsal root ganglion neurons are known as afferents.
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Neurons (also known as neurones and nerve cells) are electrically excitable cells in the nervous system that process and transmit information. In vertebrate animals, neurons are the core components of the brain, spinal cord and peripheral nerves.
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A nerve is an enclosed, cable-like bundle of axons (the long, slender projection of a neuron). Neurons are sometimes called nerve cells, though this term is technically imprecise since many neurons do not form nerves, and nerves also include the glial cells that
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In anatomy and neurology, the ventral root (or anterior root) is the efferent motor root of a spinal nerve.
At its distal end, the ventral root joins with the dorsal root to form a mixed spinal nerve.
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At its distal end, the ventral root joins with the dorsal root to form a mixed spinal nerve.
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The State University of New York Health Science Center at Brooklyn, better known as SUNY Downstate Medical Center, is an academic medical center and is the only one of its kind in the Borough of Brooklyn in New York City.
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In a typical vertebra, the vertebral foramen is the foramen formed by the anterior segment (the body), and the posterior part, the vertebral arch.
The vertebral foramen begins at cervical vertebrae #1 (atlas) and continues inferior to lumbar vertebrae #5.
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The vertebral foramen begins at cervical vertebrae #1 (atlas) and continues inferior to lumbar vertebrae #5.
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Torso is an anatomical term for the central part of the many animal bodies (including that of the human) from which extend the neck and limbs. It is sometimes referred to as the trunk. The torso includes the thorax and abdomen.
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spinal chord is a thin, tubular bundle of nerves that is an extension of the central nervous system from the brain and is enclosed in and protected by the bony vertebral column.
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The term spinal nerve generally refers to the mixed spinal nerve, which is formed from the dorsal and ventral roots that come out of the spinal cord. The spinal nerve is the bit that passes out of the vertebrae through the intervertebral foramen.
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In anatomy and neurology, the dorsal root ganglion (or spinal ganglion) is a nodule on a dorsal root that contains cell bodies of neurons in afferent spinal nerves.
The axons of dorsal root ganglion neurons are known as afferents.
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The axons of dorsal root ganglion neurons are known as afferents.
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The posterior (or dorsal) branches (or divisions) of the spinal nerves are as a rule smaller than the anterior divisions.
They are directed backward, and, with the exceptions of those of the first cervical, the fourth and fifth sacral, and the coccygeal, divide into medial
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They are directed backward, and, with the exceptions of those of the first cervical, the fourth and fifth sacral, and the coccygeal, divide into medial
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In anatomy and neurology, the ventral root (or anterior root) is the efferent motor root of a spinal nerve.
At its distal end, the ventral root joins with the dorsal root to form a mixed spinal nerve.
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At its distal end, the ventral root joins with the dorsal root to form a mixed spinal nerve.
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The ventral ramus (anterior ramus, anterior branch, anterior divisions of the spinal nerves) supply the antero-lateral parts of the trunk, and the limbs; they are for the most part larger than the posterior divisions.
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The sympathetic trunk (sympathetic chain, gangliated cord) is a bundle of nerve fibers that runs from the base of the skull to the coccyx. There are two sympathetic trunks in the body, a right one and a left one.
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Rami communicans (plural rami communicantes) is the term used for a nerve which connects two other nervers.
When used without further definition, it almost always refers to a communicating branch between a spinal nerve and the sympathetic trunk.
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When used without further definition, it almost always refers to a communicating branch between a spinal nerve and the sympathetic trunk.
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Each spinal nerve receives a branch, gray ramus communicans, from the adjacent ganglion of the sympathetic trunk.
They contain unmyelinated postganglionic sympathetic fibers.
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They contain unmyelinated postganglionic sympathetic fibers.
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The thoracic, and the first and second lumbar nerves each contribute a branch, white ramus communicans to the adjoining sympathetic ganglion.
They contain myelinated preganglionic sympathetic fibers (GVE and GVA).
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They contain myelinated preganglionic sympathetic fibers (GVE and GVA).
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"Gray Matter"
Author Stephen King
Language English
Genre(s) Horror, science fiction
Published in Cavalier (1st release) ,
Night Shift,
Arbour House Necropolis
Publication type Magazine
Media type Print
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Author Stephen King
Language English
Genre(s) Horror, science fiction
Published in Cavalier (1st release) ,
Night Shift,
Arbour House Necropolis
Publication type Magazine
Media type Print
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Rexed laminae comprise a system of ten layers of grey matter (I-X), identified in the early 1950s by Bror Rexed to label portions of the spinal cord. [1][2]
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The posterior horn (posterior column, posterior cornu, dorsal horn, spinal dorsal horn) of the spinal cord is the dorsal (more towards the back) grey matter of the spinal cord.
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The dorsal nucleus (column of Clarke, Clarke's columns, posterior thoracic nucleus) occupies the medial part of the base of the posterior column, and appears on the transverse section as a well-defined oval area.
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substantia gelatinosa of Rolando (or gelatinous substance of posterior horn of spinal cord), which contains both neuroglia cells, and small nerve cells. The gelatinous appearance is due to a very low concentration of myelinated fibers.
It is named for Luigi Rolando.
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It is named for Luigi Rolando.
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