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Purves D, Augustine GJ, Fitzpatrick D, et al., editors. Neuroscience. Second edition. Sunderland (MA): Sinauer Associates; 2001.


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The setup of gray and white issue in the spinal cord is relativelysimple: The internal of the cord is developed by gray matter, which is surrounding bywhite issue (Figure 1.11A). In transversesections, the gray issue is conventionally divided right into dorsal (posterior) lateraland ventral (anterior) “horns.” The neurons the the dorsal hornsreceive sensory information that beginning the spinal cord via the dorsal roots of thespinal nerves. The lateral horns are present primarily in the thoracicregion, and contain the preganglionic visceral engine neurons that project to thesympathetic ganglia (see number 1.10C). Theventral horns has the cell bodies of engine neurons that send axons via theventral roots of the spinal nerves to end on striated muscles. The whitematter of the spinal cord is subdivided right into dorsal (or posterior), lateral, andventral (or anterior) columns, each of which has axon tracts connected tospecific functions. The dorsal columns lug ascending sensory information fromsomatic mechanoreceptors (Figure 1.11B). Thelateral columns encompass axons that take trip from the cerebral cortex to contact spinalmotor neurons. This pathways are likewise referred to together the cortico-spinaltracts. The ventral (and ventrolateral oranterolateral) columns lug both ascendinginformation around pain and also temperature, and also descending motor information. Somegeneral rules of spinal cord organization are (1) the neurons and axons thatprocess and also relay sensory info are found dorsally; (2) that preganglionicvisceral engine neurons are discovered in an intermediate/lateral region; and also (3) thatsomatic engine neurons and also axons are uncovered in the ventral section of the cord.

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Figure 1.11

Internal framework of the spinal cord. (A) Transverse sections of thecord at three various levels, reflecting the characteristics arrangementof gray and also white issue in the cervical, thoracic, and lumbar cord. (B)Diagram of the interior structure of (more...)


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