Muscles that act on the forearm OIAs

Question 1

Biceps Brachii (long Head)

Answer 1

Origin: Supraglenoid tubercle of the scapula
Insertion: Tuberosity of the radius
Action: flexes arm (GH joint), flexes forearm(elbow joint) and supinates forearm

Question 2

Biceps Brachii (Short Head)

Answer 2

Origin: Coracoid process of the scapula
Insertion: tuberosity of the radius
Action: flexes arm (GH joint), flexes forearm (elbow joint)

Question 3

Brachialis

Answer 3

Origin: Anterior distal humerus
Insertion: coronoid process of ulna
Action: flexes forearm/elbow

Question 4

Triceps Brachii(long head)

Answer 4

Origin: Infraglenoid tubercle of the scapula
Insertion: olecranon process of ulna
Action: extends forearm/elbow and extends arm (GH joint)

Question 5

Triceps Brachii (Lateral head)

Answer 5

Origin: Proximal posterior surface of humerus
Insertion: olecranon process of ulna
Action: extends forearm/elbow

Question 6

Triceps Brachii (medial Head)

Answer 6

Origin: Distal posterior surface of humerus
Insertion: olecranon process of ulna
Action: extends forearm/elbow

Question 7

Brachioradialis

Answer 7

Origin: distal lateral humerus
Insertion: styloid process of radius
Action: flexes forearm/ elbow

Question 8

Pronator teres

Answer 8

Origin: Medial Epicondyle(humerus) and coronoid process of ulna
Insertion: mid lateral shaft of radius
Action: pronates forearm/elbow

Question 9

supinator

Answer 9

Origin: Lateral epicondyle of humerus
Insertion: anterolateral surface of radius
Action: supinates forearm/elbow