Hand Flashcards
Superficial Structures of the Palm
Thenar Eminence
Hypothenar Eminence
Innervation of Hypothenar Eminence
Deep Branch of Ulnar nerve
Innervation of Thenar Eminence
Recurrent Branch of Median Nerve
The AFO for Hypothenar Eminence
Abductor Digiti minimi
Flexor Digiti minimi
Opponens Digiti Minimi
AFO of Thenar Eminence
Abductor Pollicis Brevis
Flexor Pollicis Brevis
Opponens Pollicis Brevis
Intermediate Structures of the Palm
- Long flexor tendons
- Lumbrical Muscles
- Adductor Pollicis
Origin of long flexor tendons
tendons of flexor digitorum profundus
insertion of long flexor tendons
on extensor tendons (on the distal aspect of the hand)
Action(s) of the long flexor tendons
Flexion at MCP joints
Extension at IP joints
innervation of long flexor tendons
medial 2: deep branch of Ulnar nerve
lateral 2: median nerve
what are the two long flexor tendons
flexor digitorum superficialis and profundus
Action(s) of Adductor Pollicis
adduct the thumb
Adductor Pollicis innervation
deep branch of Ulnar Nerve
Action(s) of lumbrical muscles
flexion at MCP joints
extension at IP joints
Innervation of lumbrical muscles
medial 2: deep branch of ulnar nerve
Lateral 2: median nerve
origin of lumbrical muscles
on tendons of FDP
insertion of lumbrical muscles
on extensor tendon
Deep structures of the Palm
Interosseous muscles
(palmar and dorsal)
innervation of interosseous muscles
deep branch of ulnar nerve
origin of interosseous muscles
between metacarpal bones
insertion of interosseous muscles
on extensor tendons (on posterior/dorsal aspect of the hand)
Action of palmar interossei
- ADDUCTION of digits towards midline (digit 3)
- Flexion at MCP joints
- Extension at IP joints
Action of dorsal interossei
- ABBDUCTION of digits away from midline (digit 3)
- Flexion at MCP joints
- Extension at IP joints
Muscles the superficial branch of the ulnar nerve innervates
- palmaris brevis
- ends cutaneous: medial 1.5 digits
Muscles innervated by the deep branch of the ulnar nerve
- muscles of hypothenar eminence: Abd digiti minimi, flexor D.M., Opponens D.M.
- Medial 2 lumbricals
- palmar interossei
- dorsal interossei
- adductor pollicis
Muscles innervated by the recurrent branch of median nerve
muscles of thenar eminence
- abductor pollicis brevi
- flexor pollicis brevi
- opponens pollicis brevi
muscles in the hand innervated by the median nerve directly
- lateral 2 lumbricals
- ends cutaneous (lateral 3.5 digits)
