Hand Flashcards
Abductor Pollicis Brevis
Attachments: flexor retinaculum, tubercles of scaphoid and trapezium, base of proximal phalanx of thumb
Action: Abducts thumb (MP joint)
Innervation: Median nerve (recurrent)
Blood supply: superficial palmar branch of radial artery
thenar
Flexor Pollicis Brevis
Attachments: flexor retinaculum, tubercle of trapezium, proximal phalanx of thumb
Action: Flexes proximal phalanx of thumb
Innervation: median nerve (recurrent branch)
Blood supply: superficial palmar branch of radial artery
thenar
Opponens Pollicis
Attachments: flexor retinaculum, tubercle of trapezium, lateral side of 1st metacarpal
Action: medially rotates thumb
Innervation: Median nerve (recurrent)
Blood supply: superficial palmar branch of radial artery
thenar
Abductor Digiti Minimi
Attachments: pisiform, tendon of flexor carpi ulnaris, base of proximal phalanx of 5th digit
Action: Abducts 5th digit at MP joint
Innervation: Ulnar nerve (deep branch)
Blood supply: deep palmar branch of ulnar artery
Hypothenar
Flexor Digiti Minimi (brevis)
Attachments: flexor retinaculum, hook of hamate, proximal phalanx of digit 5
Action: flexes MP joint of digit 5
Innervation: Ulnar nerve (deep branch)
Blood supply: deep palmer branch of ulnar artery
Hypothenar
Opponens Digiti Minimi
Attachments: flexor retinaculum, hook of hamate, palmar surface of 5th metacarpal
Action: laterally rotates metacarpal 5
Innervation: Ulnar nerve (deep branch)
Blood supply: Blood supply: deep palmar branch of ulnar artery
Hypothenar
Palmar Brevis
Attachments: flexor retinaculum, palmar aponeurosis, skin on medial margin of hand
Action: Improves grip
Innervation: Ulnar nerve (superficial branch)
Blood supply: superficial palmar arch
1st Lumbrical
*digit 2
Attachments: tendons of flexor digitorum profundus, extensor expansion of digit 2
Action: flexion of MP joints, extension of IP joint
Innervation: Median nerve (digital branches)
Blood supply: superficial and deep palmar arches
2nd Lumbrical
*digit 3
Attachments: tendons of flexor digitorum profundus, extensor expansion of digit 3
Action: flexion of MP joints, extension of IP joints
Innervation: Median nerve (digital branches)
Blood supply: superficial and deep palmar arches
3rd Lumbrical
*digit 4
Attachments: tendons of flexor digitorum profundus, extensor expansion of digit 4
Action: flexion of MP joint, extension of IP joints
Innervation: Ulnar nerve (deep branch)
Blood supply: superficial and deep palmar arches
4th Lumbrical
*digit 5
Attachments: tendons of flexor digitorum profundus, extensor expansion of digit 5
Action: flexion of MP joint, extension of IP joints
Innervation: Ulnar nerve (deep branch)
Blood supply: superficial and deep palmar arches
Adductor Pollicis
Attachments: Oblique head: bases of 2 and 3 metacarpals, capitate
Transverse head: metacarpal 3
Base of proximal phalanx of thumb
Action: adducts thumb
Innervation: Ulnar nerve (deep branch)
Blood supply: Deep palmar arch
4 Dorsal Interosseous
Attachments: adjacent sides of metacarpals, extensor hood and base of proximal phalanges of digits 2-4
Action: abduction of digits 2-4 at MP joints
Innervation: Ulnar nerve (deep branch)
Blood supply: deep palmar branch
3 Palmar Interosseous
Attachments: sides of metacarpals 2, 4, 5, base of proximal phalanx and extensor expansion of digits 2, 4, and 5
Action: Adduction of digits 2, 4, 5 (toward midline) flexes digits at MP joint and extends IP joints
Innervation: Ulnar nerve (deep branch)
Blood supply: Deep palmar arch
