Musculus adductor pollicis

Musculus adductor pollicis has two heads: caput obliquum and caput transversum.

The beginning:


 * caput obliquum: bases of 2nd and 3rd metacarpus, os trapezoideum, os capitatum;
 * caput transversum: 3rd metacarpus.

Extension:


 * Capsule of metacarpophalangeal joint of thumb;
 * sesamoid bone of the thumb (ulnar).

Innervation:


 * Ulnaris nerve (ramus profundus).

Function:


 * Adduction of the thumb.