Human Anatomy - Kotsan I. Y. 2009

General overview of the muscles responsible for movements of individual body parts
Movements of the upper limb
Muscles responsible for the movements of the fingers

Muscles producing movements of the thumb at the first carpometacarpal joint:

opposition:

1) opponens pollicis Muscle; flexion:

1) flexor pollicis longus muscle;

2) flexor pollicis brevis muscle;

extension:

1) extensor pollicis longus muscle;

2) extensor pollicis brevis muscle;

abduction:

1) abductor pollicis longus muscle;

2) abductor pollicis brevis muscle;

adduction:

1) adductor pollicis muscle.

Muscles producing Movements of the II–V digits: flexion:

1) flexor digitorum superficialis muscle;

2) flexor digitorum profundus muscle;

3) interossei muscles (flex the proximal Phalanges of the II–V digits)

4) lumbrical muscles (flex the proximal phalanges of the II–V digits)

5) flexor digiti minimi brevis muscle;

extension:

1) extensor digitorum muscle;

2) extensor indicis muscle (extends the index finger);

3) extensor digiti minimi muscle (extends the little finger);

4) dorsal interossei (extend the middle and distal phalanges of the II–V digits); adduction toward the middle finger:

1) palmar interossei muscles. abduction away from the middle finger:

1) dorsal interosseous muscles.