Lecture 29 (2): ANS

Question 1

What two ganglia does the ansa subclavian connect?

Answer 1

Cervicothoracic and middle cervical ganglia

Question 2

What horn do GVE Sympathetic neurons use?

Answer 2

lateral horn

Question 3

What are the 5 GVE Sympathetic pathways?

Answer 3

1) Peripheral smooth muscles and glands of neck, thorax, abdomen and pelvic limbs
2) Peripheral smooth muscles and glands of the head
3) Thorax: Smooth muscle, glands and heart
4) Abdomen: smooth muscle and glands
5) Pelvic cavity: internal smooth muscles and glands

Question 4

GVE Symp pathway for peripheral smooth muscle and glands of thorax/abdomen

Answer 4

Lateral horn, ventral root, communicating branch, sympathetic trunk (cervicothoracic ganglion), SYNAPSE, postganglionic neurons in both ventral and dorsal branches to target tissue

Question 5

GVE Symp pathway for peripheral smooth muscles and glands of the head

Answer 5

Lateral horn, ventral root, cervicothoracic ganglion, ansa subclavian nerve carries stimuli around subclavian artery to middle cervical ganglion, vagosympathetic trunk carries stimuli to cranial cervical ganglion

Question 6

GVE Symp pathway for thoracic internal smooth muscles, glands, and HEART

Answer 6

Lateral horn, ventral root, cervicothoracic ganglion and/or middle cervical ganglion, SYNAPSE, cardiac nerves carry stimulus to target tissue

Question 7

GVE Symp pathway for abdominal smooth muscles and glands

Answer 7

Lateral horn, ventral root, communicating branch bypassing sympathetic trunk via splanchnic nerve to visceral ganglion (Celiacomesenteric, caudal mesenteric ganglia), SYNAPSE, postganglionic neuron parallel to artery

Question 8

What splanchnic nerves carry stimuli toward the celiacomesenteric ganglion/solar plexus?

Answer 8

Major and minor splanchnic nerves

Question 9

What splanchnic nerves carry stimuli toward the caudal mesenteric ganglion?

Answer 9

lumbar splanchnic nerves

Question 10

GVE Symp pathway to pelvic cavity smooth muscles and glands

Answer 10

Lateral horn, ventral root, from communicating branch to caudal mesenteric ganglion via lumbar splanchnic nerves, hypogastric nerves carry stimulus to pelvic plexus, SYNAPSE

Question 11

T/F: General visceral afferent neurons use a different pathway than somatic afferent neurons

Answer 11

False; they use the same pathway - dorsal root ganglion to dorsal root

Question 12

Where are the two PSNS nuclei in the spinal cord

Answer 12

Brainstem and sacrum

Question 13

The brainstem uses which ganglion and nerve to innervate smooth, cardiac muscles and glands?

Answer 13

Inferior ganglion of CN X, vagus nerve

Question 14

The sacral PSNS segments use which nerve and plexus to innervate smooth muscles and glands

Answer 14

pelvic nerve, pelvic plexus

Question 15

What does the left recurrent laryngeal nerve wrap around?

Answer 15

Aorta/aortic arch

Question 16

What does the right recurrent laryngeal nerve wrap around?

Answer 16

Right subclavian artery

Question 17

GVE Parasympathetic pathway

Answer 17

Lateral horn, ventral root, spinal nerve, lumbosacral plexus, pelvic nerve carries signal to pelvic plexus, SYNAPSE