Baylor

Question 1

What type of muscle fiber is typically analyzed in EMG?

Answer 1

Type I Muscle fiber

Question 2

What muscle fibers are abnormal in steroid induced myopathy?

Answer 2

Type II muscle fibers

Question 3

Recruitment RATIO is ____ in myopathic disorders

Answer 3

4 or Less (Low)

Question 4

Recruitment RATIO is ____ in neuropathic disorders

Answer 4

10 or More (High)

Question 5

Neurapraxia

Answer 5

Conduction Block
Myelin Injury
Fast recovery, good prognosis

Question 6

Axonotmesis

Answer 6

Wallerian Degeneration
Loss of conduction at site and distally
Nerve anatomically connected

Question 7

Neurotmesis

Answer 7

Nerve severed

Loss of nerve conduction at injury site and distally

Question 8

Combined sensory index

Answer 8

(Med Sensory Thumb - Radial Sensory thumb) + (median ring finger - ulnar ring finger) + (median palmar - ulnar palmar) > 1 ms

Than CTS!!!

Question 9

H-Reflex

Answer 9

2 Neuron Reflex Arc

Orthodromic Sensory and Motor

Question 10

Blink reflex involves what cranial nerves?

Answer 10

CN V (sensory) and CN VII (motor)

Question 11

What is the most commonly injured nerve in the lower extremity?

Answer 11

Fibular nerve

Question 12

What are the first changes to occur in AIDP (ex. GBS)?

Answer 12

Delayed or absent F-wave or H-reflex

Question 13

What is the most reliable predictor of poor prognosis in AIDP?

Answer 13

CMAP amplitude < 20% of normal at 3-5 weeks

Question 14

Vincristine and Dapsone affect what fibers?

Answer 14

Motor > Sensory

this is significant since most drug induced neuropathies affect sensory more than motor

Question 15

Ohm’s Law

Answer 15

i = V/R

Question 16

What is the recording AREA of a Monopolar Needle?

Answer 16

SPHERE

Question 17

What is the recording AREA of a Concentric Needle?

Answer 17

TEARDROP

Question 18

What is Common Mode Rejection Ratio?

Answer 18

Amplifies different signals

Rejects common ones

Question 19

Decrease LFF (low frequency filter) what happens to Amplitude and Peak Latency?

Answer 19

Increase Amplitude

Increase Peak Latency

Question 20

Increase LFF (low frequency filter) what happens to Amplitude and Peak Latency?

Answer 20

Decrease Amplitude

Decrease Peak Latency

Question 21

Decrease HFF (high frequency filter) what happens to Amplitude and Peak / Onset Latency?

Answer 21

Decrease Amplitude

Increase Peak and Onset Latency

Question 22

Increase HFF (high frequency filter) what happens to Amplitude and Peak / Onset Latency?

Answer 22

Increase Amplitude

Decrease Peak and Onset Latency

Question 23

Whats another word for Low Frequency Filter?

Answer 23

High Pass Filter

Question 24

Whats another word for High Frequency Filter?

Answer 24

Low Pass Filter

Question 25

Release of acetylcholine is affected by what intracellular cation?

Answer 25

Calcium

Question 26

Presynaptic NMJ disorders

Answer 26

Lambert Eaton Syndrome | Botulism

Question 27

Postsynaptic NMJ disorder

Answer 27

Myasthenia Gravis

Question 28

What is the most SENSITIVE EDX technique used to diagnose MG?

Answer 28

Single Fiber EMG

Question 29

Facilitation on repetitive stim indicates what?

Answer 29

Increase in amplitude with exercise | LEMS

Question 30

What happens to fiber density after re-innervation and collateral sprouting?

Answer 30

Fiber density increases