โ Scribed by Herrick, C. Judson
No coin nor oath required. For personal study only.
T h e cranial and first spinal nerves of Menidia have been plotted by reconstruction from serial sections in order to exhibit the relations of the nerve components both proximally and distally. In most cases the several components have been traced from their nuclei of origin or termination in the brain through the ganglia to their peripheral termination.
Throughout the gnathostome vcrtebrates we now commonly recognize four components in the typical spinal nerve-( I ) somatic motor, from tlie ventral horn cells ; ( 2 ) somatic sensory (general cutaneous), terminatiilg in the dorsal horn ; (3) visceral motor; and visceral sensory. The central relations of the last two components are still obscure. They are probably both related to the intermediate " or lateral horn zone, the sensory fibers coming in by tlie dorsal root and the motor fibers (in infi-a-mammalian groups, at least) going out by both dorsal and ventral roots.
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