Question 1

Latissimus Dorsi function

Accepted Answer

adduction or extension of the arm at the shoulder. Internal rotation of the arm at the shoulder

Question 2

Teres Major function

Accepted Answer

adduction or extension of the arm at the shoulder. Internal rotation of the arm at the shoulder

Question 3

Supraspinatus function

Accepted Answer

abduction of the arm at the shoulder. only effective during the first 80 degrees of abduction

Question 4

Infraspinatus function

Accepted Answer

external rotation of the arm at the shoulder

Question 5

Teres Minor function

Accepted Answer

external rotation of the arm at the shoulder

Question 6

Subscapularis function

Accepted Answer

internal rotation of the arm at the shoulder

Question 7

Deltoid function

Accepted Answer

flexion and internal rotation (anterior head), abduction (middle head), extension and hyperextension and external rotation (posterior head)

Question 8

Pectoralis mjr. function

Accepted Answer

flexion and internal rotation (clavicular head), horizontal adduction and internal rotation (sternal head), flexion from a hyperextended position and internal rotation (abdominal head) of the arm at the shoulder

Question 9

Subclavius function

Accepted Answer

unknown, may help to draw clavicle anteriorly

Question 10

Biceps brachii function

Accepted Answer

flexion of the arm at the shoulder, flexion of the forearm at the elbow when the wrist is supinated

Question 11

Coracobrachialis function

Accepted Answer

flexion and horizontal adduction of the arm at the shoulder

Question 12

Brachialis- function

Accepted Answer

Flesion of the forearm at the elbow in all wrist positions

Question 13

Triceps brachii- function

Accepted Answer

extension and hyperextension of the arm at the shoulder (long head only),  extension of the forearm at the elbow (long, lateral and medial heads)

Question 14

Anconeus- function

Accepted Answer

extension of the forearm at the elbow

Question 15

Brachioradialis- function

Accepted Answer

flexion of the forearm at the elbow in all wrists positions, although the muscle favors a semiprone wrist position (hammerfist)

Question 16

Pronator teres- function

Accepted Answer

pronation and flexion of the forearm at the elbow

Question 17

flexor carpi radialis- function

Accepted Answer

flexion of the forearm at the elbow, flexion of the hand at the wrist, radial deviation of the hand at the wrist

Question 18

Palmaris longus- function

Accepted Answer

tightens the flexor retinaculum and subsequently the palmar aponeurosis

Question 19

Flexor digitorum superficialis- function

Accepted Answer

flexion of the forearm at the elbow, flexion of the hand at the wrist, flexion of the digits

Question 20

Flexor carpi ulnaris- function

Accepted Answer

flexion of the forearm at the elbow, flexion of the hand at the wrist, ulnar deviation of the hand at the wrist

Question 21

Flexor degitorum profundus- function

Accepted Answer

Flexion of the hand at the wrist and flexion of the digits (from the distal phalanges)

Question 22

flexor pollicus longus- function

Accepted Answer

flexion of the hand at the wrist, flexion of the thumb

Question 23

pronator quadratus-function

Accepted Answer

pronation

Question 24

extensor carpi radialis brevis and longus- function

Accepted Answer

extension of the forearm at the elbow, extension of the hand at the wrist, radial deviation of the hand at the wrist

Question 25

Extensor digitorum- function

Accepted Answer

extension of the forearm at the elbow, extenstion of the hand at the wrist, extension of the digits

Question 26

Extensor digiti minimi- function

Accepted Answer

extension of the 5th digit

Question 27

Extensor carpi ulnaris- function

Accepted Answer

extension of the forearm at the elbow, extension of the hand at the wrist, ulnar deviation of the hand at the wrist

Question 28

Extensor indicis- function

Accepted Answer

extension of the hand at the wrist, extension of the 2nd digit

Question 29

Abductor pollicus longus- function

Accepted Answer

radial deviation of hte hand at the wrist, abduction of the thumb

Question 30

Extensor pollicus brevis- function

Accepted Answer

radial deviation of the hand at the wrist, extension of the thumb

Question 31

Extenror pollicus longus- function

Accepted Answer

radial deviation of the hand at the wrist, extension of the thumb

Question 32

Supinator- function

Accepted Answer

supinates

Question 33

Palmaris brevis- function

Accepted Answer

tightens the flexor retinaculum and subsequently the palmar aponeurosis

Question 34

Abductor pollicus brevis- function

Accepted Answer

abduction of the thumb

Question 35

Flexor Pollicus brevis- function

Accepted Answer

flexion of the thumb

Question 36

abductor digiti minimi- function

Accepted Answer

abduction of the 5th digit

Question 37

flexor digiti minimi- function

Accepted Answer

flexion of the 5th digit

Question 38

opponens- function

Accepted Answer

opposition

Question 39

dductor pollicus- function

Accepted Answer

adductino of the thumb

Question 40

lumbricals- function

Accepted Answer

flexion of the metacarpals and simultaneously extension/hyperextnesion of the digits

Question 41

Dorsal/palmar interosseous- function

Accepted Answer

adduction ofhte all of the digits (palmar interosseous) and abduction of all of the digits (dorsal interosseous)

Anatomy_UE_mus_func

Anatomy Upper Extremity Muscles functions

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