Muscles-UpperLimb

Question 1

Deltoid

O.I.A.

Answer 1

O: lateral third of clavicle,
acromion and scapular spine
I: deltoid tuberosity of humerus
A: abducts the arm

Question 2

Biceps brachii (two origins; same insertion and action)
           O.I.A.

Answer 2

I: radial tuberosity
           A: flexes and supinates 
                forearm
long head
            O: supraglenoid tubercle
short head	
            O: coracoid proces

Question 3

Brachialis

A:

Answer 3

flexes forearm

*O:Anterior surface of distal humerus
I: coronoid process of ulna/elbow joint capsule

Question 4

Triceps brachii (three origins; same insertion and action)

Answer 4

O: long head: infraglenoid tubercle of scapula lateral head: posterior shaft of humerus
medial head: posterior shaft of humerus
I: olecranon of ulna
A: extends forearm

Question 5

Brachioradialis

A:

Answer 5

synergist in forearm flexion

O: distal lateral humerus
I: Styloid process of radius

Question 6

Extensor digitorum

A:

Answer 6

extends fingers

*lateral to extensor carpi ulnaris

Question 7

Extensor carpi ulnaris

Question 8

Flexor carpi ulnaris

A:

Answer 8

flexes wrist

• along ulna

Question 9

Palmaris longus

Question 10

Flexor carpi radialis

Question 11

Pronator teres