Peripheral Nervous System

Question 1

________ means along the outside

Answer 1

periphery

Question 2

cervical plexus includes _____ rami ___________
will supply __________
________ nerve comes off of __________ and supplies the ______ for respiration

Answer 2

ventral, C1-C4
muscles and skin of the neck
phrenic, C3, C4, C5, diaphragm

Question 3

brachial plexus includes _____ rami ____________
supplies the entire _____ limb
there is a total of _____ nerves that come off the plexus

Answer 3

ventral, C5, C6, C7, C8, T1
upper
16

Question 4

musculocutaneous nerve

Answer 4

C5-C7
derived from lateral cord
supplies all anterior arm and changes name to lateral antebracheal cutaneous nerve (LAC) which supplies cutaneous innervation on lateral forearm
50% of fibers supply muscle, 50% supply skin

Question 5

median nerve

Answer 5

C5-T1 (all)
derived from medial and lateral
supplies motor and sensory nerve supply to some of anterior forearm and anterior hand
only nerve to course through the carpal tunnel

Question 6

ulnar nerve

Answer 6

C8, T1
derived from medial cord
motor and sensory supply to some anterior forearm and most of hand, in hand splits into a superficial and deep branch
lies posterior to medial epicondyle

Question 7

radial nerve

Answer 7

C5-T1
derived from posterior cord
motor and sensory supply the posterior arm, forearm skin and mm; also supplies skin on posterior upper limb
supplies nearly all posterior structures of the upper limb

Question 8

lumbosacral plexus includes _____ rami _____
lumbar plexus begins and is located in the posterior wall of the _____ within the ______ muscle
sacral plexus begins and is located in the ______

Answer 8

ventral, L1-S4
abdomen, psoas major muscle
pelvis

Question 9

lumbar plexus includes ventral rami ______
2 major nerves:
_______ nerve (____): supplies majority of the anterior thigh muscles
______ nerve (____): supplies majority of medial thigh muscles

Answer 9

L1-L4
femoral, L2-L4
obturator, L2-L4

Question 10

sacral plexus includes ventral rami _______
5 major nerves:
___________: largest cutaneous nerve in body
sciatic nerve (____): largest of all nerves in the body
near the back of the knee it branches into the ____ nerve and common ______ nerve
superior gluteal nerve (_______): supplies gluteus medius, minimus, and tensor fasciae latae
inferior gluteal nerve (_______): supplies gluteus maximus
______ nerve (______) supplies geitalia

Answer 10

L4-S4
posterior femoral cutaneous nerve
L4-S3
tibial, fibular
L4, L5, S1
L5, S1, S2
pudendal, S2,S3, S4