hand anatomy
These bones offer attachment to the palmar and dorsal interossei muscles that are responsible for side to side movement of the fingers.
In this graphic DIP indicates distal inter-phalangeal joint and PIP indicates proximal inter-phalangeal joint.
hand anatomy
Towards the small finger are a group of muscles that from a prominence on the palm known as the hypothenar eminence (mount of moon). These muscles are
palmaris brevis is a small muscle situated below the skin whose function is to improve the wrinkles on the palm enhancing grip
abductor digiti minimi moves the small finger outwards
hand anatomy
flexor digiti minimi brevis flexes the small finger at the metacarpo-phalangeal joint
opponens digiti minimi flexes the small finger at the metacarpo-phalangeal joint and rotates it laterally so as to deepen the hollow of the palm and bringing the small finger opposite to the thumb
Towards the thumb are a group of muscles that from a prominence on the palm known as the thenar eminence (mount of venus). These muscles are
hand anatomy
abductor pollicis brevis is a thin muscle situated below the skin whose function is to bring the thumb at 90 degrees to the palm
adductor pollicis moves the thumb close to the thumb and is extremely helpful in gripping (holding a motorcycle handle)
flexor pollicis brevis flexes the thumb at the metacarpo-phalangeal joint
hand anatomy
opponens pollicis flexes the thumb at the metacarpo-phalangeal joint and rotates it medially so as to deepen the hollow of the palm and bringing the thumb towards the small finger
The lumbrical muscles are four muscles that arise from the tendon of flexor digitorum profundus muscle which is responsible for flexing the distal inter-phalangeal joint. The lumbrical muscles attach to the extensor expansion. Hence they are the only muscle to join a flexor tendon to a extensor tendon. Function of these muscles is to extend the inter-phalangeal joints.
hand anatomy
At the back of the hand are the tendons of the extensor digitorum muscle that is responsible for extension of the fingers at all their joints.
hand anatomy