the act of rotating rapidly; "he gave the crank a spin"; "it broke off after much twisting" (同)twirl, twist, twisting, whirl
a distinctive interpretation (especially as used by politicians to sway public opinion); "the campaign put a favorable spin on the story"
a short drive in a car; "he took the new car for a spin"
a swift whirling motion (usually of a missile)
revolve quickly and repeatedly around ones own axis; "The dervishes whirl around and around without getting dizzy" (同)spin around, whirl, reel, gyrate
form a web by making a thread; "spiders spin a fine web"
make up a story; "spin a yarn"
stream in jets, of liquids; "The creek spun its course through the woods"
twist and turn so as to give an intended interpretation; "The Presidents spokesmen had to spin the story to make it less embarrassing"
plant by the roots
(botany) the usually underground organ that lacks buds or leaves or nodes; absorbs water and mineral salts; usually it anchors the plant to the ground
a number that, when multiplied by itself some number of times, equals a given number
cause to take roots
take root and begin to grow; "this plant roots quickly"
(linguistics) the form of a word after all affixes are removed; "thematic vowels are part of the stem" (同)root word, base, stem, theme, radical
the part of a tooth that is embedded in the jaw and serves as support (同)tooth_root
come into existence, originate; "The problem roots in her depression"
any bundle of nerve fibers running to various organs and tissues of the body (同)nervus
belonging to or on or near the back or upper surface of an animal or organ or part; "the dorsal fin is the vertical fin on the back of a fish and certain marine mammals"
The formation of the spinal nerve from the dorsal and ventral roots
Details
Identifiers
Latin
nervi spinalis radix posterior
TA98
A14.2.00.030
TA2
6146
FMA
5980
Anatomical terminology
[edit on Wikidata]
The dorsal root of spinal nerve (or posterior root of spinal nerve) is one of two "roots" which emerge from the spinal cord. It emerges directly from the spinal cord, and travels to the dorsal root ganglion. Nerve fibres with the ventral root then combine to form a spinal nerve. The dorsal root transmits sensory information, forming the afferent sensory root of a spinal nerve.
Contents
1Structure
2Additional images
3See also
4External links
Structure
The root emerges from the posterior part of the spinal cord and travels to the dorsal root ganglion. The dorsal root ganglia contain the pseudo-unipolar cell bodies of the nerve fibres which travel from the ganglia through the root into the spinal cord.
The lateral division of the dorsal root contains lightly myelinated and unmyelinated fibres of small diameter[citation needed]. These carry pain and temperature sensation. These fibers cross through the anterior white commissure to form the anterolateral system in the lateral funiculus.
The medial division of the dorsal root contains myelinated fibres of larger diameter[citation needed]. These transmit information of discriminative touch, pressure, vibration, and conscious proprioception originating from spinal levels C2 through S5. These fibers are pushed in towards the posterior median sulcus to form the gracile fasciculus and the cuneate fasciculus of the posterior column–medial lemniscus pathway.
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
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
Ventral root
External links
Anatomy figure: 02:04-06 at Human Anatomy Online, SUNY Downstate Medical Center - "Superior view of a section through the spinal cord within the vertebral foramen."
Recent studies suggest that CCR5 and its ligands are important regulators for the development of neuropathic pain and that their modulation can have some beneficial properties. Therefore, the aim of our study was to investigate the influence of maraviroc (MVC, a CCR5 antagonist) on glial polarizatio
Lithium accelerates functional motor recovery by improving remyelination of regenerating axons following ventral root avulsion and reimplantation.
Fang XY1, Zhang WM2, Zhang CF3, Wong WM4, Li W4, Wu W5, Lin JH6.
Neuroscience.Neuroscience.2016 Aug 4;329:213-25. doi: 10.1016/j.neuroscience.2016.05.010. Epub 2016 May 13.
Brachial plexus injury (BPI) often involves the complete or partial avulsion of one or more of the cervical nerve roots, which leads to permanent paralysis of the innervated muscles. Reimplantation surgery has been attempted as a clinical treatment for brachial plexus root avulsion but has failed to
Biomechanical Behaviors in Three Types of Spinal Cord Injury Mechanisms.
Khuyagbaatar B, Kim K, Man Park W, Hyuk Kim Y.
Journal of biomechanical engineering.J Biomech Eng.2016 Aug 1;138(8). doi: 10.1115/1.4033794.
Clinically, spinal cord injuries (SCIs) are radiographically evaluated and diagnosed from plain radiographs, computed tomography (CT), and magnetic resonance imaging. However, it is difficult to conclude that radiographic evaluation of SCI can directly explain the fundamental mechanism of spinal cor
… <p>Neuropathic pain is caused by lesions or diseases of the somatosensory system and is less responsive to pain medications. … Transcriptomic changes in dorsalroot ganglion (DRG) neurons are involved in initiation and maintenance of neuropathic pain. …
A dorsal nerve root – also known as a posterior nerve root – is a main bundle of nerve fibers that branches off the spinal cord and goes to other areas of the body.
A ventral root is a type of nerve root that branches off the spinal cord, exits the spinal column, and continues on its path to specific areas of the body.