Muscles of the arm and forearm Flashcards Preview

Gross Anatomy > Muscles of the arm and forearm > Flashcards

Flashcards in Muscles of the arm and forearm Deck (24):
1

biceps brachii

anterior arm
Short head:
prox: tip of coracoid process of scap
dist: tuberosity of the radius and bicipital aponeurosis
Long Head:
prox: supragenoid tubercle of the scap
dist: tuberosity of the radius and bicipital aponeurosis

supinate and flex forearm, flex arm

2

brachialis

anterior arm
prox: distal half of ant surface of humerus
dist: coronoid process and tuberosity of ulna

flex forearm

3

coracobrachialis

anterior arm
prox: coracoid process of scap
dist: middle 1/3 of medial surface of humerus

flex and adduct arm

4

triceps brachii

posterior arm
Prox:
-long head: infraglenoid tubercle of scap
-lateral head: post surface of humerus sup to radial groove
-medial head: post surface of humerus inf to radial groove
Dist: olecranon of ulna

extends forearm, long head extends arm

5

anconeus

Posterior arm
prox: lateral epicondyle of humerus
dist: lat surface of olecranon and post part of ulna

extends forearm, abducts ulna during pronation

6

pronator teres

anterior forearm
prox: coronoid process of ulna and medial epicondyles of humerus
dist: lateral surface of radius

pronate and flex forearm

7

flexor carpi radialis

anterior forearm
prox: medial epicondyle
dist: base of 2nd metacarpal

flex and abduct hand

8

palmaris longus

anterior forearm
prox: medial epicondyle
dist: flexor retinaculum and palmar aponeurosis

flex hand, tense palmar aponeurosis

9

flexor carpi ulnaris

anterior forearm
prox:medial epicondyle
dist: pisiform, hook of hamate, fifth metacarpal

flex and adduct hand

10

flexor digitorum superficialis

ant forearm
prox: med epicondyle, coronoid process of ulna, superior shaft of radius
dist: middle phalanx of digits 2-4

flexes proximal interpharyngeal joint and assists in flexion of metacarpophalangeal joints

11

flexor digitorum profundus

ant forearm
prox: shaft of ulna, interosseus membrane
dist: distal phalanx of digits 2-4

flexes distal interphalangeal joint and assists in wrist flexion

12

flexor policis longus

ant forearm
prox: ant surface of radius, interosseous membrane
dist: distal phalanx of thumb

flex phalanges of thumb

13

pronator quadratus

ant forearm
prox: distal 1/4 of ant ulna
dist: distal 1/4 of anterior radius

pronates forearm

14

brachioradialis

post forearm
prox: prox 2/3 of lateral supracondylar ridge of humerus
dist: distal radius near styloid process

flex forearm (especially in thumbs up position)

15

extensor carpi radialis longus

post forearm
prox: distal 1/3 of lateral supracondylar ridge of humerus
dist: base of 2nd metacarpal

extend and abduct hand

16

extensor carpi radialis brevis

post forearm
prox: lateral epicondyle
dist: base of 3rd metacarpal

extend and abduct hand

17

extensor digitorum

post forearm
prox: lat epicondyle
dist: extensor expansion of digits 2-5

extends digits 2-5

18

extensor digiti minimi

post forearm
prox: lateral epicondyle
dist: extensor expansion of pinky

extends pinky

19

extensor carpi ulnaris

post forearm
prox: lat epicondyle and post ulna
dist: base of 5th metacarpal

extend and adducts hand

20

supinator

post forearm
prox: lat epicondyle and supinator crest of ulna
dist: prox 1/3 of radius

supinate forearm

21

abductor pollicis longus

post forearm
prox: post aspect of the pro radius, ulna, and interosseous membrane
dist: base of 1st metacarpal

abduct and extend thumb

22

extensor pollicis longus

post forearm
prox: post aspect of middle 1/3 of ulna and interosseous membrane
dist: base of prox phalanx of thumb

extends thumb

23

extensor pollicis brevis

post forearm
prox: post aspect of distal 1/3 of radius and interosseous membrane
dist: base of prox phalanx of thumb

extends thumb

24

extensor indicis

post forearm
prox: post aspect of distal 1/3 of ulna and interosseous membrane
dist: extensor expansion of 2nd digit

extends the pointer finger