Lecture 7: Autonomic Nervous System Flashcards Preview

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Flashcards in Lecture 7: Autonomic Nervous System Deck (15):
1

Spinal Nerve

Mixed nerve carrying motor, sensory and autonomic signals between spinal cord and the body. Made of 4 types of nerve fibers

2

Dorsal Root Ganglion

Contains afferent cell bodies

3

Autonomic Nervous System

Innervates smooth muscle, Cardiac Muscle, Glands. Just GVE, not GVA under this def. 2 Motor neuron system

4

Sympathetic vs. parasympathetic

Sympathetic is thoracolumbar nerve roots (T1-L2) parasympathetic is craniosacral nerve roots

5

where are pre-ganglionic somas found

intermediolateral nucleus in column, can be seen as extral bump in gray matter in cord T1-L2

6

Where do the two neurons synapse

In either the sympathetic chain or pre-vertebral ganglion (celiac, superior mesenteric, inferior mesenteric)

7

Pathway of nerves passing through sympathetic chain

intermediolateral nucleus --> ventral root --> spinal nerve root --> white ramus communicans --> sympathetic chain ganglion (could synapse here or pass through to different ganglion through sympathetic trunk) --> synapse with post-ganglionic fiber --> axon passes through gray ramus communicans (could exit here or pass through to different ganglion through sympathetic trunk) --> down ramus --> effector

8

SPlanchnic nerve

Name for pre-ganglionic fiber when it is synapsing in pre-vertebral ganglion

9

Three pre-vertebral ganglion

celiac ganglion, superior mesenteric ganglion, inferior mesenteric ganglion

10

Four categories of splanchnic nerves with root values

Greater (T5-T9); Lesser (T10-T11), Least (T12); Lumbar (L1-L2)

11

Pre-sympathetic root values

Craniosacral Cranio (iii, iv, ix, x) sacral (S2-S4)

12

Pelvic Splanchnics

S2-S4, innervate large intestines, bladder genitals

13

Cranial Nerves

Somas in brain or brain-stem but innervate structures all over the body

14

parasympathetic vs sympathetic axon lengths

Parasympathetic long pre-ganglionic
(synpase near effector), sympathetic short pre-ganglionic

15

innervation of large intestine

Vagus innervates to left of left colic flexure, pelvic splanchnic nerve innervates to right