A text-book of physiology for medical students and physicians . all, with a few compara-tively unimportant exceptions, leave the spinal cord in the great. Fig. 251.—Schema to show the path of the preganglionic and postganglionic portionsof a vasoconstrictor nerve fiber: a. Anterior root, showing the course of the preganglionicfiber as a dotted line; d, v, dorsal and ventral branches of the spinal nerve; r, the ramuscommunicans; g, the sympathetic ganglion. The postganglionic fibers in each ramus comefrom the sympathetic ganglion with which it is connected. The preganglionic fibers enter-ing at
A text-book of physiology for medical students and physicians . all, with a few compara-tively unimportant exceptions, leave the spinal cord in the great. Fig. 251.—Schema to show the path of the preganglionic and postganglionic portionsof a vasoconstrictor nerve fiber: a. Anterior root, showing the course of the preganglionicfiber as a dotted line; d, v, dorsal and ventral branches of the spinal nerve; r, the ramuscommunicans; g, the sympathetic ganglion. The postganglionic fibers in each ramus comefrom the sympathetic ganglion with which it is connected. The preganglionic fibers enter-ing at any ganglion may pass up or down to end in the cells of some other ganglion. outflow that takes place in the thoracic region from the secondthoracic to the second lumbar nerves (p. 250). In this outflowthey are mixed with other autonomic fibers, such as the sweatfibers, pilomotor fibers, accelerator fibers to heart, pupilodilatorfibers, visceromotor fibers, etc. Emerging in the anterior roots, theypass to the sympathetic chain by way of the corresponding ramuscommunicans. Having reached the chain, they end in one or otherof the ganglia, not nece
Size: 2032px × 1230px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookautho, bookcentury1900, bookdecade1910, booksubjectphysiology
