Muscles that act on the elbow joint

Question 1

Brachialis

Answer 1

Origin-Anterior surface of distal humerus
Insertion-Coracoid process of ulna and capsule of elbow joint
Action-Flexes forearrm

Question 2

Triceps Brachii

Answer 2

Origin-
LONG HEAD: infraglenoid tubercle of scapula
LATERAL HEAD: posterior shaft of humerus
MEDIAL HEAD:posterior shaft of humerus
Insertion-By common tendon into olecranon of ulna
Action-Powerful forearm extensor

Question 3

Biceps Brachii

Answer 3

Origin-
SHORT HEAD: coracoid process
LONG HEAD: glenoid cavity
Insertion-by common tendon into radial tuberosity
Action-Flexes and supinates forearm

ALSO ACT ON FOREARM

Question 4

Brachioradialis

Answer 4

Origin- lateral ridge at distal end of humerus
Insertion- styloid process of radius
Action- Synergist in forearm flexion

ALSO ACT ON FOREARM