Insertion of extensor carpi ulnaris
Ans. is 'c' i.e., Base of 5th MetacarpalExtensor carpi ulnariso Origin : Lateral epicondyle of humerus and posterior border ulnao Insertion : Base of 5th metacarpalo Nerve supply : Posterior interosseus nerveo Action : Extension (dorsiflexion) and adduction of hand.
Base of proximal phalanx of thumb
Base of Distal phalanx of thumb
Base of 5th Metacarpal
Scaphoid base
Hand