6. Autonomic Nerves and Ganglia of Abdomen

Question 1

Identify 1 -> 3

Answer 1

1. Right greater and lesser thoracic splanchnic nerves
2. Right sympathetic trunk
3. 2nd and 3rd lumbar splanchnic nerves

Question 2

Identify 4 -> 6

Answer 2

4. Pelvic splanchnic nerves
5. Right and left hypogastric nerves to inferior hypogastric (pelvic) plexus
6. Superior hypogastric plexus

Question 3

Identify 7 -> 10

Answer 3

7. Inferior mesenteric ganglion
8. Superior mesenteric ganglion and plexus
9. Celiac ganglia
10. Vagal trunks: Anterior and Posterior

Question 4

Sympathetic and parasympathetic nerves innervate the viscera of the abdominal cavity

→ Sympathetic nerves coursing in the (1)___ and (2)___ synapse largely in 3 major collections of ganglia: (3)___.

→ A nerve plexus continuing from this most inferior ganglion gives rise to the superior hypogastric plexus, which provides sympathetic innervation to pelvic viscera.

Answer 4

1. thoracic splanchnic nerves (from T5-T12 spinal cord levels)
2. lumbar splanchnics (upper lumbar levels)
3. celiac, superior mesenteric, and inferior mesenteric ganglia

Question 5

Sympathetic nerves coursing in the thoracic splanchnic nerves (from T5-T12 spinal cord levels) and lumbar splanchnics (upper lumbar levels) synapse largely in 3 major collections of ganglia: celiac, superior mesenteric, and inferior mesenteric ganglia.

→ A nerve plexus continuing from this most inferior ganglion gives rise to the (1)___, which provides (2)___

Answer 5

1. superior hypogastric plexus
2. sympathetic innervation to pelvic viscera.

Question 6

Parasympathetic innervation to the upper two-thirds of the abdominal viscera (derived from the foregut and midgut portions of the embryonic gut) comes from the (1)___.

The remaining portions of the abdominal and pelvic viscera (embryonic hindgut) receive parasympathetics from S2, S3, and S4 via (2)___

Answer 6

(1) vagus nerve
(2) pelvic splanchnic nerves.

Question 7

Most of these autonomic fibers reach the viscera by traveling on the (1)___ originating from (2)___

Answer 7

1. blood vessels
2. the celiac trunk and the superior and inferior mesenteric arteries.

Question 8

Autonomic fibers to the bowel synapse on (1)___, an intrinsic plexus of ganglia (myenteric and submucosal) for fine control of bowel function.

Answer 8

ganglion cells of the enteric nervous system