Arm muscles

Question 1

Biceps brachii

Answer 1

Origin: Short: Coracoid process Long: Supraglenoid process scap
Insertion: Radial tuberosity
Innervation: Musculocutaneous nerve
Action: Elbow flexion and supination

Question 2

Brachialis

Answer 2

Origin: Anterior surface of the humerus
Insertion: Coronoid process of ulna
Innervation: Musculocutaneous nerve
Action: Flexion

Question 3

Coracobrachialis

Answer 3

Origin: Coracoid process of scap
Insertion: Proximal surface of the humerus
Innervation: Musculocutaneous nerve
Action: Flexion, adduction, internal rotation

Question 4

Triceps Brachii

Answer 4

Origin: Long: Infraglenoid tub of scapula Lateral + medial: Post humerus
Insertion: Olecranon of ulna
Innervation: Radial nerve
Action: Elbow extension

Question 5

Anconeus

Answer 5

Origin: Lat epi of the humerus
Insertion: Olecranon ulna
Innervation: Radial nerve
Action: Abduction/pronation