Wrist & Hand Flashcards
Flexor pollicis longus
O: Interosseus membrane, anterior surface of the radius
I: Palmar surface of the distal phalanx I
In: Median n.
A: Wrist: flexion and abduction
MCP and IP I: flexion
Carpometacarpal I: opposition
Abductor pollicis longus
O: Dorsal surface of radius and ulna Interosseous membrane
I: Base metacarpal I
In: Radial n.
A: Wrist: flexion and abduction
Carpometacarpal joint I: abduction
Extensor pollicis brevis
O: Dorsal surface of radius Interosseous membrane
I: Base of proximal phalanx I
In: Radial n.
A: Wrist: extension, abduction
Carpometacarpal and MCP joint I: extension
Extensor pollicis longus
O: Dorsal surface of ulna Interosseous membrane
I: Base of distal phalanx I
In: Radial n.
A: Carpometacarpal joint I: adduction
MCP and IP I: extension
Wrist: extension, abduction
Extensor digiti minimi
O: Lateral epicondyle of humerus
I: Medial and distal phalanges V via dorsal aponeurosis
In: Radial n.
A: Wrist: extension, ulnar deviation
MCP, PIP, DIP V: extension, abduction
Extensor indicis
O: Dorsal surface of ulna and Interosseous membrane
I: Dorsal aponeurosis II
In: Radial n.
A: II: extension, adduction
Wrist: extension, abduction
Abductor pollicis brevis (Thenar muscles)
O: Scaphoid, trapezium, flexor retinaculum
I: Base of proximal phalanx I
In: Median n.
A: Art. trapezium-MC: abduction
Abductor pollicis (Thenar muscles)
O: Transverse head: palmar surface MC III Oblique head: capitate, base MC II-III
I: Base prox phalanx I
In: Ulnar n.
A: CMC I: opposition
MCP I: flexion
Flexor pollicis brevis (Thenar muscles)
O: Superficial head: flexor retinaculum
Deep head: capitate, trapezium
I: Base prox. phalanx I
In: Ulnar and median n.
A: CMC I: flexion, opposition
Opponens pollicis (Thenar muscles)
O: Trapezium
I: Radial border metacarpal I
In: Median n.
A: CMC I: opposition
Abductor digiti minimi (Hypothenar m.)
O: Pisiforme
I: Prox. Phalanx V and dorsal aponeurosis
In: Ulnar n.
A: MCP V: flexion, Abduction
(PIP and DIP V: extension)
Palmaris brevis
O: Palmar aponeurosis
I: hypothenar eminence
In: Ulnar n.
A: Tightens aponeurosis
Opponens digiti minimi (Hypothenar m.)
O: Hook of hamate, flexor retinaculum
I: Ulnar border MC V
In: Ulnar nerve
A: MC: Opposition
Flexor digiti minimi
O: Hook of hamate, flexor retinaculum
I: Base prox. phalanx V
In: Ulnar n.
A: MCP V: flexion, abduction
Lumbricals I-IV
O: Tendons of flexor digitorum profundus m.
I: Dorsal aponeurosis
In: Ulnar and median n.
A: MCP II-V: flexion
PIP and DIP II-V: extension
Interossei dorsalis I-IV
O: Metacarpal I-V
I: dorsal aponeurosis II-IV, base and radial side of prox. phalanx
In: Ulnar n.
A: MCP II-IV: flexion
PIP and DIP II-IV: extension, Abduction of II and IV
Interossei palmares I-III
O: Ulnar side MC II, IV and V
I: Dorsal aponeurosis and base prox. phalanx of the associated finger
In: Ulnar n.
A: MCP II, IV, V: flexion
PIP and DIP II, IV, V: extension and adduction for II and IV
Anatomical snuff box
Composed by 3 tendons:
- Extensor pollicis longue
- Extensor pollicis brevis
- abductor pollicis longus
The anatomical snuff box contains:
- the radial nerve
- artery
- the cephalic vein
