Dorsal root of spinal nerve

<h2 id="structure">Structure</h2>
<p>The root emerges from the <a href="/facts/Posterior_(anatomy)/IpJ1fq2f">posterior</a> part of the <a href="/facts/Spinal_cord/XbWLr917">spinal cord</a> and travels to the <a href="/facts/Dorsal_root_ganglion/7BGJkVxV">dorsal root ganglion</a>. The dorsal root ganglia contain the <a href="/facts/Pseudounipolar_neuron/jG1LExws">pseudo-unipolar</a> <a href="/facts/Cell_bodies/L8aDnXKr">cell bodies</a> of the <a href="/facts/Nerve/q7GsAfYV">nerve</a> fibres which travel from the ganglia through the root into the spinal cord.
</p><p>The <a href="/facts/Lateral_(anatomy)/IpJ1fq2f">lateral</a> division of the dorsal root contains lightly <a href="/facts/Myelin/DKgJB8s8">myelinated</a> and unmyelinated fibres of small diameter. These carry pain and temperature sensation. These fibers cross through the <a href="/facts/Anterior_white_commissure/pRBQNapp">anterior white commissure</a> to form the <a href="/facts/Anterolateral_system/HXsEpeKY">anterolateral system</a> in the <a href="/facts/Lateral_funiculus/njN7UAsL">lateral funiculus</a>.
</p><p>The medial division of the dorsal root contains myelinated fibres of larger diameter. These transmit information of discriminative touch, pressure, vibration, and conscious <a href="/facts/Proprioception/Ik79bA2x">proprioception</a> originating from spinal levels <a href="/facts/Cervical_spinal_nerve_2/bbyvbsBT">C2</a> through <a href="/facts/Sacral_spinal_nerve_5/9DLIB7Wf">S5</a>. These fibers are pushed in towards the posterior median sulcus to form the <a href="/facts/Gracile_fasciculus/oCb3a1Rs">gracile fasciculus</a> and the cuneate fasciculus of the <a href="/facts/Posterior_column%E2%80%93medial_lemniscus_pathway/oCb3a1Rs">posterior column–medial lemniscus pathway</a>.
If the dorsal root of a spinal nerve were severed, it would lead to numbness in certain areas of the body.
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<h2 id="additional-images">Additional images</h2>

<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Ventral_root/f6V4RD2G">Ventral root</a></li></ul>

<h2 id="external-links">External links</h2>
<ul><li><a href="https://web.archive.org/web/20100101010101/http://ect.downstate.edu/courseware/haonline/figs/l02/020406.htm">Anatomy figure: 02:04-06</a> at Human Anatomy Online, SUNY Downstate Medical Center - "Superior view of a section through the spinal cord within the <a href="/facts/Vertebral_foramen/SqesBy4k">vertebral foramen</a>."</li>
<li><i><a href="http://www.anatomyatlases.org/MicroscopicAnatomy/Section06/Plate06114.shtml">Anatomy Atlases – Microscopic Anatomy, plate 06.114</a></i> - "Spinal Root Nerve Fibers"</li>
<li><a href="http://ccdb.ucsd.edu/sand/main?stype=lite&keyword=dorsal%20root&Submit=Go&event=display&start=1">Dorsal root - Cell Centered Database</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>"Spinal Nerves - an overview". ScienceDirect Topics. Archived from the original on May 6, 2021. Retrieved 2021-05-06. <a href="https://web.archive.org/web/20210506120412/https://www.sciencedirect.com/topics/neuroscience/spinal-nerves" target="_blank">https://web.archive.org/web/20210506120412/https://www.sciencedirect.com/topics/neuroscience/spinal-nerves</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
</ol>

Dorsal root of spinal nerve open-in-new

Dorsal root of spinal nerve