The main muscle of opposition is?
Opponens pollicis - Origin-flexor retinaculum crest of trapezium Inseion- lateral border and adjoining lateral half of planar surface of the 1 St metacarpal bone Actions- Opposition of thumb & deepens the hollow of palm Abductor pollicis Brevis(APB)-abducts the thumb Flexor pollicis brevis(FPB)-flexes the thumb Adductor pollicis adducts the thumb APB, FPB and opponens pollicis are the 3 thenar muscles. Reference: Textbook of anatomy upper limb and thorax, Vishram Singh,2nd edition, page no.144 Figure 11.2,page no:145- Textbook of anatomy- upper limb & thorax - vishram singh
Abductor pollicis brevis
Flexor pollicis brevis
Opponens pollicis
Adductor pollicis
Upper limb