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Systems 2nd Year: MSK > Nerve Palsies > Flashcards

Nerve Palsies Flashcards

1
Q

Erb’s Palsy affects which plexus

A

Brachial

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2
Q

Erb Palsy associated with

A

Porter’s Tip Position

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3
Q

Brachial Plexus Lesions associated with

A 
Upward Traction eg Breech delivery
T1 Damage (Intrinsic muscles)
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4
Q

Axillary Nere is what roots

A

C5/6

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5
Q

Axillary nerve wraps around where

A

surgical neck of humerus

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6
Q

Axillary nerve supplies which muscles

A

deltioid and teres minor

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7
Q

Axillary nerve supplies skin over where

A

lateral arm

regimental badge area

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8
Q

Axillary nerve commonly occurs in which conditions

A

Shoulder Dislocation

Fracture Surgical Neck of Humerus

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9
Q

Radial Nerve roots

A

C5,6,7,8 and T1

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10
Q

Radial nerve supplies where in arm

A

Triceps

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11
Q

Radial nerve runs in which groove

A

Radial groove of humerus as it passes from medial to lateral

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12
Q

Radial nerve supplies

A

BCR, ECRL and ECRB before dividing into PIN (motor) and SRN (sensory) branches

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13
Q

Radial nerve commonly occurs in

A

Entrapment
Saturday Night Palsy
Honeymoon Palsy
Crutch Palsy

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14
Q

Symptoms of Radial Nerve Palsy depends on site eg Axilla

A

loss of elbow extension, wrist extension and sensory changes forearm and hand

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15
Q

Symptoms of Radial Nerve Palsy depends on site eg Arm

A

: loss of wrist extension and sensory loss

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16
Q

Symptoms of Radial Nerve Palsy depends on site eg forearm

A

loss of finger extension (PIN)

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17
Q

Symptoms of Radial Nerve Palsy depends on site eg wrist

A

: loss of sensation (SRN) eg. handcuffs

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18
Q

medial nerve roots

A

C5,6,7,8 and T1

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19
Q

median nerve supplies

A

Flexors of Forearm (Bar FCU and medial half of FDP), LOAF muscles
Supplies sensation to radial 3.5 digits

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20
Q

carpal tunnel floor made up of

A

carpal bones

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21
Q

carpal tunnel roof made up of

A

flexor retinaculum

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22
Q

carpal tunnel contents

A

FDS x4, FDP x4, FPL and median nerve ie. 9 tendons and a nerve

23
Q

causes of carpal tunnel syndrome

A 
developmental
distal radius fracture
ganglion
fibroma
lipoma
RA
Gout
TB
Amyloid
Pregnant
Hypothyroid
24
Q

Carpal Tunnel Syndrome presentation

A

Nocturnal pain and parasthesia in part or all of the median nerve distribution

Wasting of the thenar muscles

ABP Power

25
Q

Tests for Carpal Tunnel

A

Tinnels

Phalens

26
Q

Ulnar nerve roots

A

C8 and T1

27
Q

Ulnar nerve has no branches in

A

arm

28
Q

ulnar nerve enters forearm

A

between two heads of FCU

29
Q

ulnar nerve supplies

A

medial half of FDP, FCU and all intrinsic muscles in hand BAR LOAF.

Sensation to ulnar 1.5 digits

30
Q

Cubital Tunnel present

A

between Medial epicondyle and olecranon, with fascial bands from FCU as roof

31
Q

most common nerve palsy

A

nerve entrapment

32
Q

cubital tunnel symptoms

A

numbness on ulnar side of hand and difficulty with fine tasks.

33
Q

Ulnar nerve palsy presents with

A

Wasting of muscles:
1st webspace (often most marked)
Guttering
Hypothenar wasting

34
Q

Ulnar Claw hand presents with

A

Hyperextension at MCPJ, flexion at IPJ’s

35
Q

Ulnar Paradox

A

A distal lesion has worse clawing than a proximal lesion, due to intact long flexors with a distal lesion

36
Q

How to test ulnar nerve

A 
Froment Test
Key muscles:
ADDUCTOR Pollicis (ULNAR NERVE)
FLEXOR Pollicis Longus (MEDIAN NERVE)
If Ulnar nerve not working, the patient will cheat and use FPL instead of Adductor Pollicis
37
Q

Lateral Femoral Cutaneous Nerve roots

A

L2/3

38
Q

Lateral Femoral Cutaneous Nerve where

A

lies on surface of iliacus muscle; usually exits pelvis under lateral end of inguinal ligament, but variable

39
Q

Lateral Femoral Cutaneous Nerve supplies

A

sensory to lat aspect thigh

40
Q

Lateral Femoral Cutaneous Nerve compression causes

A

“meralgia paraesthetica”

41
Q

sciatica nerve roots

A

L4-S3

42
Q

largest nerve in body

A

sciatic

43
Q

main branch of sacral nerve

A

sciatic

44
Q

sciatic nerve exits pelvis through

A

sciatic foramen below piriformis muscle

45
Q

sciatic nerve runs deep to

A

gluteus maximus muscle

46
Q

sciatic nerve supplies

A

supplies hamstring muscles in thigh (posterior) and part of adductor magnus, and all lower leg and foot muscles via terminal branches (tibial and common fibular nerves) - height of division variable (really 2 nerves)

47
Q

sciatic nerve at risk when

A

at risk from posterior dislocation of hip, intra-muscular injections and during surgery (division devastating)

48
Q

common fibular nerve roots

A

L4-S2

49
Q

common fibular nerve branch of

A

sciatic nerve

50
Q

common fibular nerve passes around

A

lat neck of fibula

51
Q

common fibular nerve divides into

A

superficial and deep fibular nerves

52
Q

common fibular nerve deficit causes

A

foot drop and slap gait

53
Q

most common injured nerve in low limb

A

common fibular nerve

Systems 2nd Year: MSK (75 decks)

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