Muscles of the Arm

Question 1

Biceps Brachii

Answer 1

Origin: 1) long head - scapula just superior to glenoid cavity. 2) short head - coracoid process of scapula
Insertion: proximal/medial radius on radial tuberosity
Action: flexes and supinates forearm

Question 2

Brachialis

Answer 2

Origin: distal half of anterior humerus
Insertion: coronoid process of ulna
Action: flexes forearm

Question 3

Brachioradialis

Answer 3

Origin: lateral/distal humerus
Insertion: distal/lateral radius
Action: flexes forearm

Question 4

Triceps brachii

Answer 4

Origin: 1) long head - posterior/lateral scapula. 2) Medial head - proximal/posterior humerus. 3) lateral head - proximal/posterior humerus
Insertion: olecranon process of ulna
Action: extends forearm