Upper limb muscles by innervation Flashcards Preview

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Flashcards in Upper limb muscles by innervation Deck (13):
1

what muscles does the musculocutaneous nerve innervate?

coracobrachialis, biceps brachii + greater part of brachialis

2

what actions do muscles of musculocutaneous nerve produce?

FLEXION
biceps brachii - beer drinking muscle, supination of forearm, flexion at elbow
corachobrachialis - flexion at shoulder
brachialis - flexion at elbow

3

which nerve innervates muscles of anterior compartment of arm?

musculocutaneous

4

what are the two branches of the axillary nerve?

anterior terminal branch
posterior terminal branch

5

what muscles does the axillary nerve innervate?

deltoid and teres minor

6

what area does the axillary nerve give sensory innervation to?

regimental patch - tapping tests axillary nerve/C5,6

7

what is the action of muscles innervated by axillary nerve?

deltoid - flexion/extension at shoulder, abduction of arm
teres minor - lateral rotation of arm

8

what are the two branches of the radial nerve?

superficial and deep

9

what muscles does the radial nerve innervate?

ARM EXTENSORS - whole posterior arm/forearm
triceps
ECRL
ECRB
Extensor digitorum
extensor digiti minimi
extensor carpi ulnaris
supinator
abductor pollicis longus
extensor pollicis brevis
extensor pollicis longus
extensor indicis

10

what are the branches of the median nerve?

anterior interosseous and palmar cutaneous (which gives off palmar digital cutaneous)
after carpal tunnel, gives off palmar digital branch and recurrent branch

11

what muscles does the median nerve innervate?

anterior forearm muscles (except FCU), thenar muscles + lateral 2 lumbricals

12

what are the branches of the ulnar nerve?

muscular branch, palmar cutaneous branch, dorsal cutaneous branch

13

what muscles does the ulnar nerve innervate?

flexor carpi ulnaris
medial half of FDP
hypothenars
lateral two lumbricals
all the interossei
palmaris brevis
adductor pollicis