Wrist Hand and Fingers Flashcards
Number of joints in hands and fingers
20
Number of bones in hands and fingers
27
Number of muscles in hands and fingers
33
Proximal row
Scaphoid
Lunate
Triquetrum
Pisiform
Distal row
Trapezium
Trapezoid
Capitate(largest)
Hamate(horn process)
Fractures to bones of this row most frequent
Proximal
Condyloid joint that consists of radius scaphoid and lunate
Radiocarpal joint
What kind of joint is first digit/pollicis?(carpal/metacarpal)
Saddle
Flexors of the wrist
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris
Extensors of the wrist
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi radialis ulnaris
Flexor carpi radialis OIA
O: Med epicondyle humerus
I: Base of 2nd metacarpal
A: Flexion & Radial deviation
check for pulse
Palmaris longus OIA
O: Medial epicondyle humerus
I: Palmar Aponeurosis
A: Flexion
Flexor carpi ulnaris OIA
O: medial epicondyle, olecrenon process(ulna)
I: Pisiform
A: Flexion, ulnar deviation
Extensor carpi radialis longus OIA
O: Lateral epicondyle I: Dorsal surface 2nd metacarpal A: Extension and radial deviation antagonist to flexion synergistic to rad dev
Extensor carpi radialis brevis OIA
O: Lateral epicondyle of humerus
I: Dorsal surface of 3rd metacarpal
A: Extension
Extensor carpi ulnaris OIA
O: lateral epicondyle
I: base of 5th metacarpal
A: Extension & ulnar dev
Extrinsic finger muscle flexors
Flexor digitorum superficialis
Flexor digitorum profundus
Extrinsic finger muscle extensor(s)
Extensor digitorum
Flexor digitorum superficial(2-5) OIA
O: Medial epicondyle & medial border of radius, splits into 4 tendons, passes through carpal tunnel, splits again…
I: Each side of the middle phalanx
A: Flexes wrist, MP, PIP
Flexor digitorum profundus OIA
O: surface of the ulna splits into 4 tendons, passes through carpal tunnel…
I: Distal phalanges
A: Flexes wrist, MP, PIP, DIP
Extensor digitorum OIA
O: lateral epicondyle
splits into 4 tendons
I: extensor mechanism
A: extends wrist, MP, PIP, DIP
Extensor Indicies OIA
O: Ulna
I: Extensor digitorum tendon
A: Extends MP PIP DIP
Extensor digiti minimum
extends fifth digit
Intrinsic muscles (2-4)
lumbricals
dorsal and palmar interossi
hyperthenar muscles
Name means earth worms
Lumbricals
What muscles cause forearm pronation and supination?
Pronation: Pronator teres, pronator quadratus
Supination: biceps brachii, brachioradialis, supinator
Workhorse of elbow flexors
Brachialis
Nursemaid’s elbow
Dislocation of head of radius slipping out from the anular ligament of radius.
Anatomical snuffbox tendons
extensor pollicis brevis, abductor pollicis longus
