Autonomic NS - Symp Div

Question 1

The parasymp div of the ANS is known as the ____________ div due to its regional locations.

Answer 1

thoracolumbar

Question 2

What are the main prevertebral ganglia? (4)

Answer 2

celiac
superior mesenteric
aorticorenal
inferior mesenteric

Question 3

Where do symp presyn cell bodies lie?

Answer 3

spinal grey matter, forming the lateral horns

Question 4

Generally, what does the symp NS innervate?

Answer 4

viscera, sweat glands, arrector pili mm, blood vessels

Question 5

Generally, where are the symp chain ganglia?

Answer 5

line up vertically along both sides of the vertebral column from neck to pelvis

Question 6

Successive chain ganglia are interconnected by short nerves to into…

Answer 6

sympathetic trunks

Question 7

There is approximately ___ chain ganglion for each spinal nerve.

Answer 7

one

Question 8

Out of the 22-24 pairs of chain ganglia, how many are cervical ganglia?

Answer 8

3 cervical ganglia (superior, middle and inf ganglia)

Question 9

What forms the stellate ganglion?

Answer 9

inferior cervical ganglia fusing with first thoracic ganglia

Question 10

Cervical (symp chain) ganglia lie just anterior to the _____________ of the cervical vertebrae.

Answer 10

transverse processes

Question 11

Thoracic (symp chain) ganglia lie on the _______ of the ribs.

Answer 11

heads of the ribs

Question 12

Lumbar (symp chain) ganglia lie on the ____________ of the vertebral bodies.

Answer 12

anterolateral sides

Question 13

Generally compare locations of prevertebral and paravertebral ganglia.

Answer 13

paravertebral – along sides of vertebral column
prevertebral – ant to vertebral column

Question 14

How do symp prevertebral ganglia differ from paravertebral chain ganglia?

Answer 14

• not paired
• not segmentally arranged
• lie ant to vert column

Question 15

Generally describe the pathway of a symp n from the origin outwards.

Answer 15

> presynaptic symp cell bodies lie in lateral horn of SC
motor axons exit through ventral roots
axons enter the spinal nerve
pass thru white ramus communicantes to nearest chain ganglion
4 options after that

Question 16

What does symp presynaptic axon do upon entering the symp chain?

Answer 16

> syn with postsyn neuron in same chain ganglia
pass thru w/o syn and run w splanchnic n to syn in prevertebral ganglion
can ascend in chain and syn in chain or in prevertebral ganglia at diff level
can descend in chain and syn in chain or in prevertebral ganglia at diff level

Question 17

White rami contain all the ________ fibers and grey rami contain all the _________ fibers.

Answer 17

white rami – presynaptic (myelinated, comes out of SN)
grey rami – postsynaptic (less myelinated, enters SN)

Question 18

What is the symp pathway to the periphery?

Answer 18

> presyn symp enter chain ganglia, syn with postsyn cell bodies
postsyn cell bodies travel into grey ramus communicans to ventral ramus
then travel to skin (sweat glands, arrector pili, peripheral vessels)

Question 19

What is the symp pathway to the head?

Answer 19

> originate in T1-T4
ascend and syn in sup cervical ganglion
postsyn fibers ‘jump’ on arteries of the neck
follow them to the effector organs

Question 20

What is the symp pathway to the thorax?

Answer 20

> presyn fibers originate at T1-T6
some syn in nearest chain ganglion, postsyn fibers go to effector organ (lungs, esophagus)
some asc and syn in sup cerv ganglion, postsyn descend via cardiac plexus

Question 21

What is the symp pathway to the abdomen?

Answer 21

> presyn fibers originate in inf 1/2 of lumbosacral plexus (T5-L2)
pass thru adjacent chain ganglia thru thoracic splanchnic nerves
syn in celiac ganglia or sup mesenteric ganglia
post syn travel to effector organs (apleen, stomach, liver, kidney, proximal 1/2 of large intestine)

Question 22

What is the symp pathway to the pelvis?

Answer 22

> presyn fibers originate in most inf part of div (T10-L2)
desc in symp trunks to lumbar and sacral chain ganglia
some syn here or in inf mesenteric ganglion and travel via inf hypogastric plexus
others will syn in prevertebral ganglia but travel in same plexuses
postsyn fibers travel to pelvic organs (bladder, rep organs, distal 1/2 of large intestine)

Question 23

Where do symp fibers to periphery synapse?

Answer 23

chain ganglia

Question 24

Where do symp fibers to the head synapse?

Answer 24

sup cervical ganglion

Question 25

Where do symp fibers to thorax synapse?

Answer 25

nearest chain ganglion OR sup cervical ganglion

Question 26

Where do symp fibers to abdomen synapse?

Answer 26

celiac ganglia OR sup mesenteric ganglia

Question 27

Where do symp fibers to pelvis synapse?

Answer 27

lumbar and sacral chain ganglia OR inf mesenteric ganglion OR prevertebral ganglia

Question 28

“fight or flight”

Answer 28

sympathetic

Question 29

sympathetic division arises from the

Answer 29

thoracolumbar levels

Question 30

why is the sympathetic division more complex than the parasympathetic division?

Answer 30

complex innervation patterns

Question 31

examples of the sympathetic division

Answer 31

nervous sweating and goosebumps

Question 32

sympathetic division has more

Answer 32

ganglia (chain & prevertenral ganglia)

Question 33

there are between 21 and 22 ____ ____ ganglia per side in the typical person

Answer 33

sympathetic chain

Question 34

sympathetic fibers synapse (connect) to periphery via ____ ____

Answer 34

chain ganglia

Question 35

preganglionic neurons from cardiopulmonary splanchnics, terminate in

Answer 35

cardiac plexus