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Lecture 53: Abdominopelvic Autonomic Supply

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Posted by lae2 on October 13, 2021 at 17:45:46:

Essay Questions

Perturbed pelvic visceral organs inferior to the pelvic pain line can refer pain to the foot. Describe the pathway that general visceral afferent information (both nociceptive and homeostatic) follows superior and inferior to the pelvic pain line. Include in your answer the location of the cell bodies and pathway of the axons for both preganglionic and postganglionic neurons. Explain why the perturbation of pelvic visceral organs can refer pain to the foot.
Appendicitis may elicit a diffuse, periumbilical discomfort at the T10 dermatome, before localizing to the right lower quadrant of the abdomen. Describe the pathway of parasympathetic and sympathetic innervation to the foregut, midgut, and hindgut, including the location of the cell bodies and the pathway of the axons for both preganglionic and postganglionic neurons. Explain why appendicitis can refer pain to the umbilicus (T10) using your knowledge of the pathway of nociceptive general visceral afferent information.

True False Questions

Lumbar splanchnic nerves convey preganglionic sympathetic fibers, having cell bodies in the intermediolateral cell column of L1-2, from the lumbar sympathetic trunk ganglia to the aortic plexus.
Sacral splanchnic nerves convey preganglionic sympathetic fibers, having cell bodies in the intermediolateral cell column of L1-2, from the sacral sympathetic trunk ganglia to the inferior hypogastric plexus.
Pelvic splanchnic nerves convey preganglionic parasympathetic fibers, having cell bodies in the intermediolateral cell column of S2-4, from the ventral rami of S2-4 to the inferior hypogastric plexus.
The greater splanchnic nerve conveys preganglionic sympathetic fibers, having cell bodies in the intermediolateral cell column of T5-9, from the confluence of thoracic splanchnic nerves to the celiac ganglion.
The lesser splanchnic nerve conveys preganglionic sympathetic fibers, having cell bodies in the intermediolateral cell column of T10-11, from the confluence of thoracic splanchnic nerves to the superior mesenteric ganglion.
The least splanchnic nerve conveys preganglionic sympathetic fibers, having cell bodies in the intermediolateral cell column of T12, from the twelfth thoracic splanchnic nerve to the aorticorenal ganglion.
Postganglionic sympathetic cell bodies that innervate the foregut are located in the celiac ganglion and elaborate fibers that travel in the celiac periarterial autonomic plexus.
Postganglionic sympathetic cell bodies that innervate the midgut are located in the superior mesenteric ganglion and elaborate fibers that travel in the superior mesenteric periarterial autonomic plexus.
Postganglionic sympathetic cell bodies that innervate the hindgut are located in the inferior mesenteric ganglion and elaborate fibers that travel in the inferior mesenteric periarterial autonomic plexus.
Preganglionic parasympathetic cell bodies that influence the foregut are located in the dorsal motor nucleus of the vagus nerve and elaborate fibers that travel in the celiac periarterial autonomic plexus.
Preganglionic parasympathetic cell bodies that influence the midgut are located in the dorsal motor nucleus of the vagus nerve and elaborate fibers that travel in the superior mesenteric periarterial autonomic plexus.
Postganglionic parasympathetic cell bodies that innervate the foregut, midgut, and hindgut are located in intrinsic ganglia located within the walls of the foregut, midgut, and hindgut.
Preganglionic parasympathetic cell bodies that influence the hindgut are located in the intermediolateral cell column of S2-4 and elaborate fibers that travel in ventral rami, pelvic splanchnic nerves, inferior hypogastric plexus, left hypogastric nerve, and along a retroperitoneal non-periarterial pathway toward the margin of the hindgut.



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