UE III and IV: Muscle Actions

Question 1

Pectoralis major

Answer 1

Humerus:
+ adduct
+ medially rotate

Question 2

Pectoralis minor

Answer 2

Scapula:

+ stabilizes

Question 3

Serratus anterior

Answer 3

Scapula:
+ protract
+ glenoid-up rotate

Question 4

Coracobrachialis

Answer 4

Humerus:
+ adduct
+ flex

Question 5

Biceps brachii

Answer 5

Forearm:
+ flex
+ supinate (if flexed)

Question 6

Brachialis

Answer 6

Forearm:

+ flex

Question 7

Pronator teres

Answer 7

Forearm:

+ pronate

Question 8

Flexor carpi radialis

Answer 8

Forearm:
+ pronate

Hand:
+ flex

Question 9

Palmaris longus

Answer 9

Hand:

+ flex

Question 10

Flexor carpi ulnaris

Answer 10

Hand:
+ adduct
+ flex

Question 11

Flexor digitorum superficialis

Answer 11

MCPs and PIPs of middle phalanges 2-5:

+ flex

Question 12

Flexor digitorum profundus

Answer 12

DIPs of distal phalanges 2-5:

+ flex

Question 13

Flexor pollicis longus

Answer 13

IP of pollex:

+ flex

Question 14

Pronator quadratus

Answer 14

Forearm:

+ pronate

Question 15

Thenar mm

Answer 15

Pollex:
+ abduct
+ flex
+ opposition

Question 16

Hypothenar mm

Answer 16

Digit 5:
+ abduct
+ flex
+ opposition

Question 17

Lumbricals

Answer 17

MCPs of digits 2-5:
+ flex

PIPs and DIPs of digits 2-5:
+ extend

Question 18

Palmar interossei

Answer 18

Digits 2, 4, 5:

+ adduct

Question 19

Dorsal interossei

Answer 19

Digits 2, 3, 4:

+ abduct