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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

GVA's are located at what cord segments

T1-L2/3 and S2-4