Wrist and Hand Flashcards
5 extrinsic wrist flexors
Flexor carpi radialis
Flexor carpi ulnaris
Palmaris longus
Flexor digitorum superficialis
Flexor digitorum profundus
Flexor carpi radialis O and I
Origin = Medial epicondyle of the humerus
Insertion = Base of the 2nd and 3rd metacarpals
Concentric actions of the flexor carpi radialis
Wrist flexion and wrist radial deviation
Flexor carpi ulnaris O and I
Origin - Medial epicondyle of the humerus
* Insertion - Pisiform and Hook of the Hamate, base of the 5th metacarpal
Concentric actions of the flexor carpi ulnaris
Wrist flexion and ulnar deviation
Palmaris longus O and I
Origin - Medial epicondyle of the humerus
Insertion - Palmar aponeurosis
Concentric action of the palmaris longus
Wrist flexion
Flexor digitorum superficialis O and I
Origin - Medial epicondyle
Insertion- Sides of base of middle phalanx of 2nd – 5th fingers
Concentric actions of the flexor digitorum superficialis
- Wrist flexion
- 2nd – 5th finger MCP flexion
- 2nd – 5th finger PIP flexion
Concentric actions of the flexor digitorum profundus
- Wrist flexion
- 2nd – 5th MCP flexion
- 2nd – 5th PIP flexion
- 2nd – 5th DIP flexion
6 extrinsic wrist extensors
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi ulnaris
Extensor digitorum
Extensor digiti minimi
Extensor indicis
O and I of Extensor Carpi Radialis Longus
Origin - Lateral supracondylar ridge of the humerus and the lateral epicondyle of the
humerus
Insertion - Base of the 2nd metacarpal
Concentric action of the extensor carpi radialis longus
- Wrist extension
- Wrist radial deviation (abduction)
O and I of the extensor carpi radialis brevis
O = lateral epicondyle
I = base of the 3rd metacarpal
Primary concentric action of the extensor carpi radialis brevis
Wrist extension
Wrist radial deviation