Hand Information Flashcards
Do palmar interosseous muscles adduct of abduct the fingers?
PAD = Palmar Interossei does finger adduction
Do dorsal interosseous muscles adduct of abduct the fingers?
DAB = Dorsal Interossei does finger abduction
How many tendons pass through the carpal tunnel?
NINE
flexor digitorum profundus (four tendons)
flexor digitorum superficialis (four tendons)
flexor pollicis longus (one tendon)
What casues carpal tunnel syndrome?
Compression of the median nerve
Ulnar nerve dysfunction causes what?
CLAW HAND
Intrinsic muscle atrophy in the hand which results in a hyperextension of the MCP joints and flexion of the PIP and DIP joints
Radial nerve damage causes what?
WRIST DROP
Weakens the muscle extensors of the wrist which makes it impossible to close the fist completely
Ulnar nerve paralysis results in what?
The 4th and 5th fingers cannot be extended
Damage to the median nerve at the elbow or wrist causes what?
APE HAND DEFORMITY
The thumb cannot abduct because the abductor pollicis brevis is impaired
2 Types of grip
Power and Precision
Which muscle tendons make up the anatomical snuff box?
Extensor pollicis longus (most medial)
Extensor pollicis brevis (opposite side/middle tnedon)
Abductor pollicis longus (outer most tendon)
What bone is at the floor of the snuff box?
Scaphoid
What artery runs through the snuff box?
Radial Artery
The extensor expansion divides into how many bands?
3
What is boutonniere deformity?
a deformed position of the fingers or toes, in which the joint nearest the knuckle is permanently bent toward the palm while the farthest joint is bent back away
Boutonniere deformity may be a progression of what?
RA
