Answer
Muscles of the the thenar eminence act on the thumb or pollex.
Work Step by Step
The thenar area is the area at the base of the thumb or pollex. The three thenar muscles arise from the flexor retinaculum, and control the fine movements of the pollex:
1, The Abductor pollicis brevis abducts the thumb.
2. Flexor pollicis brevis flexes the thumb.
3. Opponens pollicis, opposes the thumb.
