Flashcards in ANS Deck (37)
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1
primary effector system for controlling smooth muscle, cardiac muscle and glands
autonomic nervous system (visceral motor system)
2
finely myelinated; synapses with many postganglionic neurons; inhibitory interneurons present in ganglion; cell bodies in CNS
preganglionic neurons
3
unmyelinated; goes to effector; cell bodies in ANS ganglia
may be excitatory or inhibitory
postganglionic neurons
4
flight or flight division
sympathetic division
5
sympathetic division - thoracolumbar division - preganglionic neurons are located in what nuclei @ what spinal cord segements
- intermediate gray (intermediolateral cell column)
- T1 - L2/3
6
sympathetic division -
preganglionic vs postganglionic fiber types
pre - B fibers (little myelin)
post - C fiber (no myelin)
7
preganlionic neurons that pass through the chain and synapse in _______
prevertebral ganglia
8
postganglionic neurons exit chain in what 3 ways
- in gray ramus
- as specific nerve
- a prevertebral ganglion
9
preganglionic pathway for an effector in the head
(sympathetics)
- T1/2 synapse in superior cervical ganglion (told when to fire by descending tracts)
10
postganglionic pathway for an effector in the head
(sympathetics)
- neurons take a ride with external carotid artery (or branches of facial artery)
- form carotid nerve then becomes carotid plexus then into skull into cavernous sinus then superior orbital fissure then with other nerves
11
preganglionic pathway for an effector in thoracic region
(sympathetics)
- T1-T4/5 synapse (some) others will ascend and synapse in super cervical ganglion, middle cervical ganglion, or stellate ganglion
12
postganglionic pathway for an effector in thoracic region
(sympathetics)
- cardiac branches (form own nerve) and go down through the neck
13
preganglionic pathway for an effector in the periphery
- T1-L2/3 in white ramus and synapse at according ganglion
14
postganglionic pathway for an effector in the periphery
- gray rami to peripheral effectors (dorsal ramus and ventral ramus) @ every spinal cord level
15
name the cervical ganglia of the sympathetic system
- superior
- middle
- stellate (cervicothoracic)
16
name the nerves and cord segments that correlate with the thoracic ganglia of the sympathetic system
- splanchnic nerves
T5-T9 - greater splanchnic n
T9/10-T10/11 - lesser splanchnic n
T12 or lowest - least splanchnic n
17
name the region and number of ganglia in sympathetic system
cervical - n/a
thoracic - 11
lumbar - 4
pelvic - 4/5
18
major (sympathetic and p/s) plexus
- cardiac
- pulmonary
- celiac
- hypogastric
19
rest and digest division
parasympathetic division
20
cranial nerves of brainstem in craniosacral division of p/s
- oculomotor
- facial
- glossopharyngeal
- vagus
21
pelvic splanchnics associate with what cord segments
S2-4
22
sacral autonomic nucleus (S2-4) is located in what lamina
VII
23
pathways of the sacral autonomic nucleus
- nucleus in lamina VII
- axons come out ventral root of cauda equina
- exit into pelvic cavity within pelvic splanchnic nerves
24
organs effected by p/s
- heart
- eye
- salivary glands
- bladder
- reproductive organs (erection/ejaculation)
25
peripheral effectors of p/s
- sweat glands
- vasculature (vasomotor tone)
- arrector pili muscles
26
provide information about changes in the body's internal environment; unconscious but may mediate some conscious visceral sensation such as hunger, nausea, and distension
general visceral afferents
27
which cranial nerves are most associated with GVA's
CN 9 and 10
28
____ region aids in regulation of normal physiological function
vagal and pelvic afferents
- vagus n
- pelvic splanchnic nerves
29
_____ region aids in transmitting mechanosensitive information and pathophysiological information related to potentially harmful mechanical or chemical stimuli resulting from ischemia, inflammation, and tissue injury
spinal afferents
30
