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Spinal Cord 45<br />
Dura mater<br />
Arachnoid mater<br />
Pia mater<br />
Posterior root<br />
Anterior root<br />
White ramus<br />
Figure 6-1 The spinal nerve.<br />
Gray ramus<br />
Spinal ganglion<br />
(dorsal root ganglion)<br />
IV<br />
Location of the Major Motor and Sensory Nuclei<br />
of the Spinal Cord<br />
A. The ciliospinal center of Budge, from C8 to T2, contains the preganglionic sympathetic neurons that<br />
innervate the superior cervical ganglion to provide sympathetic innervation of the eye.<br />
B. The intermediolateral cell column, of the lateral horn, from T1 to L2, contains all of the preganglionic<br />
sympathetic cell bodies in the body.<br />
C. The posterior thoracic nucleus (nucleus dorsalis of Clarke), from C8 to L2, gives rise to the posterior<br />
spinocerebellar tract.<br />
D. The sacral parasympathetic nucleus, from S2 to S4<br />
E. The spinal accessory nucleus, from C1 to C6<br />
F. The phrenic nucleus, from C3 to C5<br />
G. Substantia gelatinosa and nucleus proprius, found at all spinal cord levels, contain neurons that<br />
mediate light touch, pain, and temperature.
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