Peripheral Nervous System

Question 1

CN X (Vagus)

Answer 1

innervates heart lungs, abdomen, chest, upper

digestive tract

Question 2

CN XI (Accessory)

Answer 2

purely somatic, innervates neck and shoulders

Question 3

Number of vertebrae (cervical, thoracic, lumbar, sacral, coccyx)

Answer 3

7,12,5,5,4

Question 4

Number of nerves

Answer 4

8,12,5,5,1

Question 5

C1-C5

Answer 5

cervical plexus (neck, diaphragm -C345)

Question 6

C5-8, T1

Answer 6

brachial plexus (upper limbs)

Question 7

T1-T12

Answer 7

intercostal nerves (lungs, thoracic cage)

Question 8

L1-L4

Answer 8

lumbar plexus (abdominal walls, lower limbs)

Question 9

L5-S4

Answer 9

sacral plexus (pelvis, perineum, lower limbs)

Question 10

preganglionic fibers of sympathetic system stem from

Answer 10

T1-12

Question 11

preganglionic fibers of the parasympathetic system stem in from

Answer 11

CN III, VII, IX, X, S2-4)

Question 12

sympathetic nervious system: ventral root –> spinal nerve and ventral ramus through _____

Answer 12

white rami communicans

Question 13

greater splanchnic, lesser splanchnic, least

Answer 13

T5-9, T10-11, T12

Question 14

post ganglionic nervuron can do:

Answer 14

re-enter gray rami communicans to join spinal nerves via dorsal/ventral rmi, target crianial and thoracic viscera, target abdominal viscera (splanchnic)

Question 15

CNIII

Answer 15

eye smooth muscles

Question 16

CN VII

Answer 16

salivary muscles, lacrimal gland

Question 17

CN IX

Answer 17

parotid salivary muscles

Question 18

CNX

Answer 18

heart lungs foregut midgut (vagus)

Question 19

vagus nerve travels down to terminal ganglia which can occur

Answer 19

thorax walls, wall of foregut and midgut

Question 20

white/grey rami communicans

Answer 20

white = pre, grey = post

Question 21

sacral splanchnic vs. pelvic splanchnic

Answer 21

sympathetic vs. poarasympathetic