Muscles of the Thumb
Abductor Pollicis Brevis (APB)
Prime mover for abduction, and opposition of the carpometacarpal and abduction of the metacarpalphalange. Location: Volar, radial side. Thenar Muscle
Abductor Pollicis Longus (APL)
Prime mover for extension and abduction of the carpometacarpal. Location: Dorsal, radial side Part of the Anatomical Snuffbox
Flexor Pollicis Brevis (FPB)
Prime mover for flexion, abduction, and opposition of the carpometacarpal and flexion of the metacarpalphalange. Location: Volar, radial side. Thenar Muscle
Adductor Pollicis (AP)
Prime mover for flexion, adduction, and opposition of the carpometacarpal and flexion and adduction of the metacarpalphalange. Location: Volar, radial side Thenar Muscle
Flexor Pollicis Longus (FPL)
Prime mover for flexion, adduction, and opposition of the carpometacarpal, flexion of the metacarpalphalange, and flexion of the interphalange. Location: Volar, radial side
Opponens Pollicis (OP)
Prime mover for opposition of the carpometacarpal. Location: Volar, radial side. Thenar Muscle
Extensor Pollicis Brevis (EPB)
Prime mover of extension for the carpometacarpal and metacarpalphalanges. Assists with abduction of the carpometacarpal Location: Dorsal, radial side. Part of the Anatomical Snuffbox
Extensor Pollicis Longus (EPL)
Prime mover of extension for the carpometacarpal, metacarpalphalanges, and interphalanges and abbuction of the carpometacarpal. Location: Dorsal, radial side Part of the Anatomical Snuffbox