OT 531 Musculoskeletal Anatomy (Nerve Lesions- Median Nerve)

with median nerve damage writing is possible between...

thumb and index finger

thumb can only preform what action causing what?

adduction; lobster claw

someone with median nerve damage and hold object between

4th and 5th digits and palm

injury of median nerve at or proximal to the elbow will cause

1. loss of pronation

2. loss of digital flexors (except little and ring finger)

3. paralysis of thenar muscles & 1st two lumbricals

4. flattening of thenar eminence

5. thumb cannot be placed in opposition and its pinching action is lost

loss of pronation is due to

pronator teres and quadratus

loss of digital flexors (except little and ring fingers) is due to

flexor digitorum profundus is 1/2 innervated by ulnar nerve

due to loss of median nerve function, sensation is lost in

hand dermatome for median nerve

injury of median nerve at wrist will cause

1. paralysis of thenar muscles & 1st two lumbricals

2. flattening of thenar eminence

3. thumb cannot be placed in opposition and its pinching action is lost

4. thumb can still flex due to flexor pollicis longus

clinical tests for median nerve damage

if extend fingers= "give me a high five"

you will see sign of benediction?

if make a fist= digits 4 & 5 flexed, 2 & 3 partially flexed

simian/ape hand=?