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Flashcards in Examination of the hand Deck (13):
1

Important consequence of ulnar nerve damage at wrist
Why does this cause ulnar claw

Paralysis of medial 2 lumbricals, leading to:
Hyperextension of MCP joints of ring and little fingers
Flexion of IP joints of ring and little fingers (extensor muscles can't extend at IP joints as their energy is dissipated in hyperextension at MCP joints)

2

When is ulnar claw apparent

At rest

3

How is ulnar paradox caused

Ulnar nerve damage at elbow

4

What muscles are paralysed in ulnar nerve damage at elbow

Medial 2 lumbricals
Flexor carpi ulnaris
Medial 1/2 of flexor digitorum profundus

5

Is ulnar paradox more or less evident than ulnar claw
Why

Less
Paralysis of flexor digitorum profundus means there is no Flexion at distal IP of ring and little fingers

6

What's associated with median nerve damage at the elbow

Hand of benediction

7

What's associated with median nerve damage at wrist

Carpal tunnel syndrome

8

When is hand of benediction evident

When patient tries to make a fist

9

Important consequence of median nerve damage at elbow
Why does this cause hand of benediction

Paralysis of:
Lateral 2 lumbricals

When patient makes a fist this leads to:
Inability to flex MCP joints of index and middle fingers

10

How to test radial nerve function

Hold wrist and ask patient to extend wrist against your hand

11

How to test median nerve function

Ask patient to abduct thumb against your finger
Ask patient to oppose thumb against your finger

12

How to test ulnar nerve function

Ask patient to abduct fingers against your fingers
Froment's test - pull paper from under patients flat thumb (positive test if they can't keep thumb flat)

13

How is ulnar claw formed

Ulnar nerve lesion at wrist

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