Thumb Anatomy Muscle. The thenar eminence is a group of three small muscles at the base of the thumb. Base of first metacarpal.
The thenar muscle group is found at the base of the thumb forming the muscle bulk on the thumb side of the hand. Adductor pollicis abductor pollicis brevis flexor pollicis brevis and opponens pollicis. The thumb pulleys attach to the palmar aspect of the phalanges and hold the FPL in place preventing tendon bowstringing.
The thumb pulleys attach to the palmar aspect of the phalanges and hold the FPL in place preventing tendon bowstringing.
The Flexor Pollicis Brevis FPB Abductor Pollicis Brevis APB and Opponens Pollicis OP diagram 6. Ebraheims educational animated video describes the anatomy of the extensor musclesThere are three extensors of the thumb. The abductor pollicis brevis the flexor pollicis brevis and the opponens pollicis. Abductor Pollicis Brevis Origin.
