Ulnar nerve Flashcards Preview

Anatomy > Ulnar nerve > Flashcards

Flashcards in Ulnar nerve Deck (20):
1

Which muscles does the Ulnar nerve innervate?

The muscles of the hand (except the thenar muscles and 2 lateral lumbricals)
Flexor carpi ulnaris
Flexor digitorum profundus

2

What is the sensory innervation of the Ulnar nerve?

Anterior and posterior of the Medial one and a half fingers and associated palm area

3

What spinal roots supply the Ulnar nerve?

C8 and T1

4

What is the route of the Ulnar nerve?

Down the Medial side of the arm
Pass the Medial epichondyle
Passes down the forearm

5

What are the 3 branches of the Ulnar nerve?

Muscular branch
Palmar branch
Dorsal branch

6

Where does the Ulnar nerve travel by the hand?

Superficial to the flexor reticaculum known as the Ulnar canal

7

What is Ulnar tunnel syndrome?

Entrapment of Ulnar nerve as it passes through the Ulnar tunnel

8

What muscles are innervated by the Ulnar nerve?

Flexor carpi ulnaris
Flexor digitorum profundus
Hypothenar muscles
Medial 2 lumbricals
Interossei
Adductor pollicis

9

What are the 3 branches of the Ulnar nerve?

Palmar cutaneous
Dorsal cutaneous
Superficial branch

10

What does the Palmar cutaneous branch of the Ulnar nerve innervate?

Sensation in the medial half of the palm

11

What does the dorsal cutaneous branch of the Ulnar nerve innervate?

Sensation in the medial half of the dorsum of the hand.
Dorsal surface of the medial one and a half fingers

12

What does the superficial branch of the Ulnar nerve innervate?

Sensation to the palmar surface of the medial one and a half fingers

13

How is the Ulnar nerve commonly damaged at the Elbow?

Fracture of the Medial epichondyle

14

When there is damage to the Ulnar nerve at the elbow, what is the motor damage?

Paralysis of all the muscles innervated by the Ulnar nerve

15

When there is damage to the Ulnar nerve at the elbow, what is the sensory damage?

Loss of sensation in all areas supplied by the Ulnar nerve

16

What are the signs of damage to the Ulnar nerve at the elbow?

Cannot grip paper placed between gtheir fingers

17

How is the Ulnar nerve damaged at the wrist?

Lacerations to the wrist

18

When the Ulnar nerve is damaged at the wrist, what is the motor damage?

Paralysis of interossei, Medial 2 lumbricals

19

When the Ulnar nerve is damaged at the wrist, what is the sensation damage?

Sensory loss over palmar side of medial one and a half fingers only

20

When the Ulnar nerve is damaged at the wrist, what is the characteristic sign?

Cannot grip paper placed between their fingers.
In long term cases get the Ulnar claw