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Encyclopedia > Posterior roots to the spinal cord
Dorsal root
The formation of the spinal nerve from the dorsal and ventral roots
Latin radix posterior
Gray's subject #208 916
MeSH Dorsal+Roots
Dorlands/Elsevier r_12/12709389

In anatomy and neurology, the dorsal root (or posterior root) is the afferent sensory root of a spinal nerve. Image File history File links Spinal_nerve. ... For other uses, see Latin (disambiguation). ... 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. ... Elseviers logo. ... Human heart and lungs, from an older edition of Grays Anatomy. ... Neurology is a branch of medicine dealing with disorders of the nervous system. ... The mechanism of the reflex arc In the nervous system, afferent neurons--otherwise known as sensory or receptor neurons--carry nerve impulses from receptors or sense organs toward the central nervous system. ... 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 expression (collectively also called proprioception). ... 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. ...

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. This is a dorsal root ganglion (DRG) from a chicken embryo (around stage of day 7) after incubation overnight in NGF growth medium stained with anti-neurofilament antibody. ... This article is about cells in the nervous system. ... Nerves (yellow) Nerves redirects here. ...

If the dorsal root of a spinal nerve were severed it would lead to numbness in certain areas of the body.

Additional images

See also

In anatomy and neurology, the ventral root is the efferent motor root of a spinal nerve. ...

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"



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