Origin	Flexor retinaculum, scaphoid, and trapezium
Insertion	Lateral side of base of proximal phalanx of thumb
Nerve	Median
Action	Abducts thumb

• Flexor retinaculum and trapezium
• Base of proximal phalanx of thumb
• Median
• Flexes thumb
• Opponens pollicis

• Lateral side of first metacarpal
• Median
• Opposes thumb to other digits

• Capitate and bases of second and third metacarpals (oblique head); palmar surface of third
• metacarpal (transverse head)
• Medial side of base of proximal phalanx of the thumb
• Ulnar
• Adducts thumb

• Medial side of flexor retinaculum, palmar aponeurosis
• Skin of medial side of palm
• Ulnar
• Wrinkles skin on medial side of palm

• Pisiform and tendon of flexor carpi ulnaris
• Medial side of base of proximal phalanx of little finger
• Ulnar
• Abducts little finger

• Flexor retinaculum and hook of hamate
• Medial side of base of proximal phalanx of little finger
• Ulnar
• Flexes proximal phalanx of little finger
• Opponens digiti minimi

• Medial side of fifth metacarpal
• Ulnar
• Opposes little finger

• Lateral side of tendons of flexor digitorum profundus
• Lateral side of extensor expansion
• Median (two Flex metacarpophal lateral) and angeal joints ulnar (two and extend medial)
• interphalangeal joints

• Adjacent sides of metacarpal bones
• Lateral sides of bases of proximal phalanges; extenso: expansion
• Ulnar
• Abduct fingers; flex metacarpophal angeal joints; extend interphalangeal joints

• Medial side of second metacarpal; lateral sides of fourth and fifth metacarpals
• Bases of proximal phalanges in same sides as their origins; extensor expansion
• Ulnar
• Adduct fingers; flex metacarpophal angeal joints; extend interphalangeal joints