Q4 station 3 Muscles of the upper limbs

Question 1

rotator cuff muscles

Subscapularis does what?

Answer 1

medially rotates arm at shoulder

Question 2

rotator cuff muscles

supraspinatus does what?

Answer 2

initiates and assists in abduction of the arm at shoulder

Question 3

rotator cuff muscles

infraspinatus does what?

Answer 3

laterally rotates arm at shoulder

Question 4

rotator cuff muscles

teres minor does what?

Answer 4

laterally rotates arm at shoulder

Question 5

Where does teres minor originate?

Answer 5

lateral boarder of scapula

Question 6

name the origin insertion and action of teres major m.

Answer 6

inferior angle of scapula

medial lip of intertubercular sulcus of humerus

extension, medial rotation and adduction of the arm at the shoulder joint

Question 7

name the origin insertion and action of coracobrachialis

Answer 7

coricoid process

medial margin of shaft of humerus

adduction and flexion of the arm at the shoulder

Question 8

name the origin insertion and action of pectoralis major

Answer 8

cartilages of ribs 2-6. body of stermun, inferior medial portion of clavical

crest of greater tubercle and lateral lip of intertubercular sulcus of humerus

flexion adduction and medial rotation of arm at shoulder joint

Question 9

name the origin insertion and action of latissimus dorsi

Answer 9

spinous processes of inferior thoracic and all lumbar and sacaral vertebrea, ribs 8-12 and thoracolumbar fascia

floor of intertubercular sulcus of the humerus

extension, adduction and medial rotation of the arm at the shoulder joint

Question 10

name the origin insertion and action of deltoid

Answer 10

Clavical acromion process spine of scapula

deltoid tuberosity

Question 11

when the anterior, middle and posterior fibers of the deltoid work collectively together what movement is produced?

Answer 11

abduction of the arm

Question 12

what movement is produced when the anterior fibers of the deltoid work alone?

Answer 12

flexion and medial rotation of arm at the shoulder

Question 13

what movement is produced when the posteroir fibers of the deltoid work alone?

Answer 13

extension and lateral rotation

Question 14

Identify the actions associated with biceps brachii

Answer 14

flexion of the arm at the shoulder
flexion of the forearm at the elbow
supination of the forearm/ hand

Question 15

Identify the actions associated with brachialis

Answer 15

flexion of forearm at the elbow

Question 16

Identify the actions associated with brachioradialis

Answer 16

flexion of the forearm at the elbow

Question 17

Identify the actions associated with triceps brachii

Answer 17

extension of the forearm at the elbow joint

the long head is also involved with adduction and extension of the arm at the shoulder

Question 18

Identify the actions associated with anconeus

Answer 18

extension of the forearm at the elbow

Question 19

Identify the actions associated with supinator m.

Answer 19

supinates; brings the forearm and hand back into the anatomical position

Question 20

Identify the actions associated with pronator teres m.

Answer 20

rotates the radius against the ulna at the proximal radioulnar joint, a pronator of the hand

Question 21

Identify the actions associated with pronator quadratus

Answer 21

rotates the radius against the ulna at the distal radioulnar joint, a pronator of the hand

Question 22

What are the three muscles that flex the hand and where do they originate?

Answer 22

flexor carpi radialis m.
flexor carpi ulnaris m.
palmaris longus m.

medial epicondyle of humerus

Question 23

what are the three muscles that extend the hand at the wrist. where do they originate?

Answer 23

extensor carpi radialis longus
extensor carpi radialis brevis
extensor carpi ulnaris

lateral epicondyle of humerus