dissection of the upper limb

Question 1

biceps brachii

Answer 1

origin: scapula
insertion: radius
innervation: musculocutaneous n.
action: flexes the forearm

Question 2

brachialis

Answer 2

origin: humerus
insertion: ulna
innervation: musculocutaneous n.
flexes the forearm

Question 3

long head of triceps

Answer 3

origin: glenoid cavity
insertion: olecranon process of ulna
innervation: radial n.
extends the forearm and adducts the arm

Question 4

lateral and medial head of triceps

Answer 4

origin: humerus
insertion: olecranon process of ulna
innervation: radial n.
action: extends the forearm

Question 5

brachioradialis

Answer 5

origin: humerus
insertion: radius
innervation: radial n.
action: flexes the elbow

Question 6

pronator teres

Answer 6

origin: ulna
insertion: radius
innervation: median n.
action: pronates the forearm

Question 7

flexor carpi radialis

Answer 7

origin: humerus
insertion: metacarpals
innervation: median n.
action: flexes the wrist, abducts the hand

Question 8

flexor carpi ulnaris

Answer 8

origin: ulna
insertion: medial carpal and 5th metacarpal
innervation: ulnar n.
action: flexes wrist, adducts hand

Question 9

palmaris longus

Answer 9

origin: humerus
insertion: flexor retinaculum
innervation: median n.
action: flexes the wrist

Question 10

flexor digitorum profundus

Answer 10

origin: ulna
insertion: distal phalanges of medial 4
innervation: median n.
action: flexes MCP, PIP, and DIP

Question 11

extensor carpi radialis longus and brevis

Answer 11

origin: humerus
insertion: 2nd and 3rd metacarpals
innervation: radial n.
action: extends the wrist and abducts the hand

Question 12

extensor carpi ulnaris

Answer 12

origin: lateral epicondyle
insertion: metacarpal of 5th digit
innervation: radial n.
action: extends the wrist, adducts the hand

Question 13

extensor digitorum

Answer 13

origin: lateral epicondyle
insertion: middle and distal phalanges of medial 4 digits
innervation: radial n.
action: extends MCP, PIP, and DIP
extends wrist