Muscles that Act on the Forearm OIAs

Question 1

biceps brachii (Long Head)

Answer 1

O: supraglenoid tubercle of scapula
I: tuberosity of radius
A: flexes arm, flexes forearm, and supinates forearm

Question 2

biceps brachii (Short Head)

Answer 2

O: coracoid process of scapula
I: tuberosity of radius
A: flexes arm, flexes forearm

Question 3

brachialis

Answer 3

O: anterior, distal humerus
I: coronoid process of ulna
A: flexes forearm/elbow

Question 4

triceps brachii (Long Head)

Answer 4

O: infraglenoid tubercle of scapula
I: olecranon process of ulna
A: extends forearm/elbow and extends arm

Question 5

triceps brachii (Lateral Head)

Answer 5

O: proximal posterior surface of humerus
I: olecranon process of ulna
A: extends forearm/elbow

Question 6

triceps brachii (Medial Head)

Answer 6

O: distal posterior surface of humerus
I: olecranon process of ulna
A: extends forearm/elbow

Question 7

brachioradialis

Answer 7

O: distal-lateral humerus
I: styloid process of radius
A: flexes forearm/elbow

Question 8

pronator teres

Answer 8

O: medial epicondyle and coronoid process
I: mid-lateral shaft of radius
A: pronates forearm/elbow

Question 9

supinator

Answer 9

O: lateral epicondyle of humerus
I: anterolateral surface of radius
A: supinates forearm/elbow