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Neurologia > ENMG > Flashcards

ENMG Flashcards

1
Q

O que acontece com amplitude com perda axonal

A

Diminui

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2
Q

O que é latência?

A

Do estímulo até o início da onda

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3
Q

Como está a latência em desmielinizacao

A

Prolonged

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4
Q

Tempo de resposta tardia nos MS

A

20-35 ms

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5
Q

Tempo de resposta tarde nos MIS

A

45-60 ms

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6
Q

O que é onda F

A

Estímulo supra máximo motor distal que vai até medula, ativa neurônios motores e voltam distalmente

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7
Q

O que inclui resposta tardia

A

Onda F e reflexo H

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8
Q

O que devemos responder ao observamos onda F e reflexo H

A

Se existem e se tem latências mínimas

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9
Q

O que é o reflexo H

A

Estimulação de um nervo sensitivo para produzir uma resposta motora tardia

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10
Q

Característica perda axonal inicial

A

Diminuição da amplitude

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11
Q

Característica perda axonal tardia

A

Além da diminuição de amplitude, latência pode aumentar um pouco e velocidade diminuir por perda de fibras grossas

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12
Q

Características desmielinizacao

A

Diminui velocidade de condução e dispersão temporal (aumento da duração). Pode ter bloqueio de condução.

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13
Q

O que é bloqueio de condução

A

Redução de pelo menos 50% de amplitude/area proximal comparada com distal

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14
Q

O que vemos na desmielinizacao proximal

A

Prolongamento de onda F e reflexo H

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15
Q

EMG neurogenica

A

Unidades motoras grandes e polifásicas e diminuição do recrutamento

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16
Q

EMG miopatica

A

Unidades motoras pequenas, polifasicas e com recrutamento motor precoce

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17
Q

Tipos de sensibilidade avaliadas na ENMG

A

Tátil, vibratória e propriocepcao

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18
Q

Para avaliar fibras finas

A

Quantitative testing and autonomic testing

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19
Q

Raíz ulnar

A

C8-T1

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20
Q

Raíz mediano

A

C5-T1

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21
Q

Raíz radial

A

C5-T1

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22
Q

Fibular nerve root

A

L4-S2

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23
Q

Sural nerve root

A

S1-S2

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24
Q

Tibial nerve root

A

L4-S3

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25
Q

Peroneal nerv root

A

L4-S2

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26
Q

What is motor unit recruitment?

A

Activation of motor units with voluntary muscle contraction

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27
Q

Distal motor amplitude medial nerve

A

Above 5 mV

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28
Q

Distal motor amplitude ulnar nerve

A

Above 5,8 mV

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29
Q

Distal motor amplitude tibial nerve

A

Above 2 mV

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30
Q

Distal motor amplitude peroneal

A

Above 2,2

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31
Q

Distal motor latency median

A

Bellow 4,3 ms

32
Q

Distal motor latency ulnar

A

Bellow 3,5 ms

33
Q

Distal motor latency tibial

A

Bellow 7,3 ms

34
Q

Distal motor latency peroneal

A

Bellow 6 ms

35
Q

Distal motor duration ulnar and tibial

A

Bellow 8,1 ms

36
Q

Distal motor duration median

A

Bellow 7,7

37
Q

Distal motor duration peroneal

A

Bellow 8,6

38
Q

Motor nerves evaluated in NCS

A

Tibial, peroneal, median, ulnar

39
Q

Sensory nerves evaluated in NCS

A

Sural, superficial peroneal, median, ulnar

40
Q

F-waves evaluated in NCS

A

Tibial, median, ulnar

41
Q

H-reflex evaluated in NCS

A

Tibial

42
Q

Stimulation site in motor tibial

A

Ankle and knee

43
Q

Recording site in motor tibial

A

FHB (flexor hallucis brevis)

44
Q

Stimulation site in motor peroneal

A

Ankle, fibular head, above knee

45
Q

Recording site in motor peroneal

A

EDB (Extensor Digitorum Brevis), TA (Transverse abdominis) if peroneal nerve palsy

46
Q

Stimulation site in sensory sural

A

Ankle

47
Q

Recording site in sensory sural

A

Calf

48
Q

Stimulation site in sensory superficial peroneal

A

Leg

49
Q

Recording site in sensory superficial peroneal

A

Ankle

50
Q

Stimulation site in Tibial f-waves

A

Ankle

51
Q

Recording site in Tibial f-waves

A

FHB (flexor hallucis brevis)

52
Q

Stimulation site in motor median

A

Wrist median anterior, elbow at the pulse

53
Q

Recording site in motor median

A

APB (abductor pollicis brevis)

54
Q

Stimulation site in motor ulnar

A

Wrist anterior lateral, bellow elbow, above elbow (usually 10 cm diference)

55
Q

Recording site in motor ulnar

A

ADM (abductor digiti minimi), if ulnar neuropathy, add FDI (first dorsal interosseous)

56
Q

Stimulation site in sensory median

A

Palm, D2

57
Q

Recording site in sensory median

A

Wrist

58
Q

Stimulation site in sensory ulnar

A

Palm, D5. Wrist if ulnar neuropathy

59
Q

Recording site in sensory ulnar

A

Wrist. Above elbow if ulnar neuropathy

60
Q

Stimulation site in median f-waves

A

Wrist anterior medial

61
Q

Recording site in median f-waves

A

APB (abductor pollicis brevis)

62
Q

Stimulation site in ulnar f-waves

A

Wrist anterior lateral

63
Q

Recording site in ulnar f-waves

A

ADM (abductor digiti minimi)

64
Q

Stimulation site in tibial H-reflex

A

Knee

65
Q

Recording site in tibial H-reflex

A

Soleus

66
Q

Stimulation site in sensory sural

A

Ankle

67
Q

Recording site in sensory sural

A

Calf

68
Q

How much can we accept of amplitude decrease when going more proximal?

A

20%

69
Q

What to do when you don’t get a wave?

A

Increase voltage or duration or position of stimulation of active and reference

70
Q

Duration classic setup in machine

A

0,2ms

71
Q

The light in the stimulater means what?

A

The direction of the stimulus

72
Q

Difference between motor and sensitive stimulation

A

Sensitive is continuous, motor no

73
Q

Amplitude in contraction

A

200mV

74
Q

Amplitude in rest

A

50mV

75
Q

Colors of cables meaning

A

Green ground, black active, red reference

Neurologia (14 decks)

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