ANS of H and N

Question 1

another name for sympathetic division?

Answer 1

thoracolumbar division of ANS

Question 2

intermediolateral cell colum is what? found where? Houses what cells?

Answer 2

found in lateral horn of T1-L2/3

• every cell body of the presynaptic neurons of the sympathetic system is found in only one location
• somatotopically arranged

Question 3

the paired IMLs are part of the ___ matter of the spinal cord, from T1-L2/3

Answer 3

gray matter

Question 4

input to IML comes in to the _____ neurons from several CNS location

Answer 4

presynaptic neurons

*from hypothalamus, amygdala, periaqueductal gray matter

Question 5

presynaptic cell bodies for the Head and neck are found?

Answer 5

in T1-T3 of the IML

Question 6

sympathetic pathway

Answer 6

1) cell body of presynaptic neurons inlateral horn (IML)
2) anterior (motor) root of spinal nerve
3) mixed spinal nerve
4) anterior ramus of spinal nerve
5) white ramus communicans
6) auonomic (paravertebral) ganglion

Question 7

the cell bodies of POST synaptic sympathetic neurons are found in what two locations?

Answer 7

1) paravertebral

2) prevetebral

Question 8

paravertebral ganglia are linked to form?

Answer 8

the R and L sympathetic trunks on either side of the vertebral column, extending the entire length of the column
(prevertebral back with abdominal pelvic cavity)

Question 9

all sympathetic fibers heading to the head and neck synpase in one of what 3 ganglion?

Answer 9

1) superior cervical ganglion
2) middle cervical ganglion
3) inferior cervical ganglion aka stellate ganglion

Question 10

post-syn SYM vs post-syn PARA

Answer 10

post-syn SYM hitch a ride on anything (nerves or arteries)

post-syn PARA hitch a ride on CNs

Question 11

the axons from presynaptic neurons that enter the sympathetic trunk may do one of what 4 things?

Answer 11

1) ascend to a higher level
2) desend
3) synapse at the level of entry
4) traverse the trunk WITHOUT synapsing to becomes part of an abdominopelvic splanchnic nerve to rsynapse within the suprarenal glands

Question 12

all smooth muscles and glands of teh H&N receive ___-synaptic fibers

Answer 12

post-synaptic sym from hithcing rides

Question 13

post-synaptic sym fibers surround blood vessels are called

Answer 13

peri-arterial plexus

Question 14

what is the only post-synaptic sym nerve?

Answer 14

deep petrosal

Question 15

what are the 4 common responses to post-synaptic sym once they reach their destination?

Answer 15

1) vasomotion -diameter of vessels
2) sudomotion - sweat
3) pilomotion - hair
4) pupillary dilation - pupil

Question 16

another name for parasym?

Answer 16

craniosacral atutonomic system

Question 17

where are the presynaptic neuron cell bodies of para?

Answer 17

only exist in 4 pairs of brainstem nuclei and from gray matter of S2-4

1) edinger-Westphal nucleus (CN 3)
2) superior salivatory nuc (CN 7)
3) inferior salivatory nuc (CN 9)
4) dorsal vagal nuc (CN 10)

Question 18

all cell bodies of pre-syn para are going to have their axons carried by?

Answer 18

3, 7, 9, 10

Question 19

what happens to para AFTER the 4 pairs of nuclei in brain-stem of pre-syn?

Answer 19

axons will travel via CNs to get to their post-syn cell bodies in the ganglia

Question 20

CN 10 is carrying?

Answer 20

presynaptic para to visceral plexeses (cardiac, esophageal, celiac) and postsynaptic para cell bodies area INTRAMURAL (within terminal organ)