Strain Transverse head Adductor Pollicis
Adductor Pollicis origin: transverse head: distal 2/3 of palmar surface of 3rd metacarpal bone. oblique head: capitate bone, base of 2nd and 3rd metacarpal bone. insertion: two heads converge to insert onto ulnar sesamoid, lateral tubercle of proximal phalanx and the volar plate of the 1st digit. action: adduction and aids in flexion of the thumb at MP joint: supplies 50% of the adduction force to the first metacarpal.
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