<P> The most superficial muscle in the thenar group is the abductor pollicis brevis . The abductor brings the thumb away from the other four fingers . The flexor pollicis brevis , which lies next to the abductor , will flex the thumb , curling it up in the palm . The opponens pollicis lies deep to abductor pollicis brevis . As its name suggests it opposes the thumb , bringing it against the fingers . This is a very important movement , as most of human hand dexterity including grip comes from this action . </P>
<P> The most superficial muscle in the thenar group is the abductor pollicis brevis . The abductor brings the thumb away from the other four fingers . The flexor pollicis brevis , which lies next to the abductor , will flex the thumb , curling it up in the palm . The opponens pollicis lies deep to abductor pollicis brevis . As its name suggests it opposes the thumb , bringing it against the fingers . This is a very important movement , as most of human hand dexterity including grip comes from this action . </P>
when opposing the thumb which muscle is active
when opposing the thumb which muscle is active
opponens pollicis
opponens pollicis