Unit Two Nerves Of Hand Flashcards

1
Q

What two nerves supply the hand

A

Median and ulnar nerve

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2
Q

Does the radial nerve supply the muscles in the hand

A

No but does have sensory distribution in the hand

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3
Q

The palmar cutaneous branch of the median nerve separates where

A

Prior to the carpal tunnel and passes over the flexor retinaculum

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4
Q

Palmar cutaneous branch supplies what

A

Midpalmar surface

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5
Q

What supplies the palmar surfaces of digits 1-3 and lateral half of the 4th, and the dorsum of the distal half of digits 1-4

A

Sensory branch of median nerve

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6
Q

The ulnar nerve runs distally in the forearm under what muscle

A

Flexor carpi ulnaris

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7
Q

The ulnar nerve enters the wrist via

A

Ulnar canal

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8
Q

Does the palmar cutaneous branch of the ulnar nerve pass through the flexor retinaculum

A

No, it passes superficial

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9
Q

The dorsal cutaneous branch of ulnar nerve supplies what

A

Medial half of dorsum of hand and the 5th finger and medial half of the 4th digit

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10
Q

The palmar cutaneous branch of the ulnar nerve supplies what

A

Proximal hypothenar eminence

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11
Q

The superficial branch of the ulnar supplies what

A

Anterior surface of the 4th and 5th digits

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12
Q

The deep branch of the ulnar nerve supplies what

A

Hypothenar muscles, the interossei, lumbricals of 4th and 5th digits and the adductor pollicis and deep head of flexor pollicis brevis, local joints

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13
Q

The ulnar nerve is known as

A

The nerve of the fine finger movements

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14
Q

The radial nerves supplies what of the hand

A

Skin over the lateral 2/3rds of the dorsum of the hand, thumb and proximal lateral 1.5 digits

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15
Q

What is the primary and initial complaint of carpal tunnel syndrome

A

Paresthesias

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16
Q

When does carpal tunnel syndrome act the worse

A

At night but relieved by hand movement

17
Q

What is an indication of chronic compression of carpal tunnel syndrome

A

Thenar waisting

18
Q

What other symptoms contribute to carpal tunnel syndrome

A

Hypothyroidism, osteoarthritis, diabetes, wrist trauma, pregnancy, hypothyroidism, acromegaly, tumor (lipoma, ganglion cyst, synovial cyst)

19
Q

What are some irritating or inflammation (sensory nerves) symptoms of carpal tunnel syndrome

A

Pain and paresthesisas

20
Q

What some ablative symptoms of carpal tunnel syndrome

A

Numbness/ anesthesia and weakness/atrophy

21
Q

What are some worsening symptoms of carpal tunnel syndrome

A

Decrease sensation at the volar pads of the thumb and index finger due to compression of median nerves

22
Q

What muscle is not completely affected by median nerve during carpal tunnel syndrome

A

Flexor pollicis brevis

23
Q

Aka of ulnar nerve compression

A

Guyons canal syndrome

24
Q

What causes guyons canal syndrome

A

Entrapment of the ulnar nerve in the guyon canal as passes through the wrist

25
Symptoms of guyons canal syndrome
Begins with paresthesias in ring and pinky, follow by decreased sensation and eventually weakness and clumsiness in the hand as the small muscles of the hand are involved
26
If the ulnar nerve is compressed at the wrist, what happens to the sensation of the dorsum of the hand
Normal sensation
27
How many zones in guyons canal
Three
28
If there is a lesion in zone 1 of guyons canal what occurs
Motor and sensory symptoms
29
Lesion in zone 2 of guyons canal
Motor deficits
30
Lesions in zone 3 of guyons canal
Sensory deficits
31
What ligaments are affected in guyons canal syndrome
Pisohamate ligament, trans carpal ligament, volar carpal ligament
32
What syndrome is common in road cyclists
Handlebar palsy, ulnar nerve compression