1.3 Upper Limbs - Muscle and Fascia

Question 1

Adducts and medially rotates humerus

Draws scapula anteriorly and inferiorly

Answer 1

Pectoralis major

Question 2

Stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall

Answer 2

Pectoralis minor

Question 3

Anchors and depresses clavicle

Answer 3

Subclavius

Question 4

Protracts scapula and holds it against thoracic wall

Rotates scapula

Answer 4

Serratus anterior

Question 5

Elevates, depresses and retracts scapula; rotate glenoid cavity superiorly

Answer 5

Trapezius

Question 6

Extends, adducts, and medially rotates humerus, raises body towards arms during climbing

Answer 6

Latissimus dorsi

Question 7

Elevates scapula and tilts its glenoid cavity inferiorly by rotating scapula

Answer 7

Levator scapulae

Question 8

Retract scapula and rotate it to depress glenoid cavity

Fixes scapula to thoracic wall

Answer 8

Rhomboids

Question 9

Clavicular part flexes and medially rotates arm
Acromial part abducts arm
Spinal part extends and laterally rotates arm

Answer 9

Deltoid

Question 10

Initiates and assists deltoid in abduction of arm and acts with rotator cuff muscles

Answer 10

Supraspinatus

Question 11

Laterally rotates arm and acts with rotator muscles

Answer 11

Infraspinatus and Teres minor

Question 12

Adducts and medially rotates arm

Answer 12

Teres major

Question 13

Medially rotates arm as part of rotator cuff;

Helps hold head of humerus in glenoid cavity

Answer 13

Subscapularis

Question 14

Supinates forearm and when supine, flexes forearm

Short head resists dislocation of shoulder

Answer 14

Biceps brachii

Question 15

Helps flex and adduct arm;

Resist dislocation of should

Answer 15

Coracobrachialis

Question 16

Flexes forearm in all positions

Answer 16

Brachialis

Question 17

Chief extensor of forearm;
Long head resists dislocation of humerus;
Especially importation during adduction

Answer 17

Triceps brachii

Question 18

Assists triceps in extending forearm;
Stabilizes elbow joint;
May abduct ulna during pronation

Answer 18

Anconeus

Question 19

Pronates and flexes forearm at elbow

Answer 19

Pronator teres

Question 20

Flexes and abducts hand at wrist

Answer 20

Flexor carpi radialis

Question 21

Flexes hand at wrist and tenses palmar aponeurosis

Answer 21

Palmaris longus

Question 22

Flexes and adducts hand at wrist

Answer 22

Flexor carpi ulnaris

Question 23

Flexes middle phalanges at proximal interphalangeal joints of middle four digits
Also flexes proximal phalanges at matecarpophalangeal joints

Answer 23

Flexor digitorum superficialis

Question 24

Flexes distal phalanges 2 to 5 at distal interphalangeal joints

Answer 24

Flexor digitorum profundus

Question 25

Pronates forearm

Deep fibers bind radius and ulna together

Answer 25

Pronator quadratus

Question 26

Flexes thumb

Answer 26

Flexor policis brevis

Question 27

Abducts thumb, helps oppose it

Answer 27

Abductor policis brevis

Question 28

Abducts thumb toward lateral border of palm

Answer 28

Abductor policis longus

Question 29

Abducts 5th digit; assists in flexion of its proximal phalanx

Answer 29

Abductor digiti minimi

Question 30

Flexes proximal phalanx of 5th digit

Answer 30

Flexor dgiti minimi brevis