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EMG

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Certificate Practice Quizzes Quiz on EMG, created by eds neuro on 10/03/2016.
eds neuro
Quiz by eds neuro, updated more than 1 year ago
eds neuro
Created by eds neuro over 8 years ago
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Resource summary

Question 1

Question
When recording a TOF from the posterior tibial nerve at the ankle, which muscle would be best to record the response?
Answer
  • tibalis anterior
  • abductor hallucis

Question 2

Question
The best muscles for L4-S1 pedicle screw stimulation would be the:
Answer
  • tibialis anterior and gastrocnemius
  • vastus medialis and biceps femoris

Question 3

Question
The best muscle to record S-EMG for an S2-S4 instrumentation procedure is the:
Answer
  • tibialis anterior
  • anal sphincter

Question 4

Question
Which procedure may be done to reduce muscle spasticity?
Answer
  • selective dorsal root rhizotomy
  • mediolateral cordotomy

Question 5

Question
Which muscle is innervated by L4-S1 nerve roots?
Answer
  • iliopsoas
  • tibialis anterior

Question 6

Question
Which muscle is innervated by the C5 nerve root?
Answer
  • deltoid
  • pronator teres

Question 7

Question
Which muscle is innervated by the C7 nerve root?
Answer
  • triceps brachii
  • rectus abdominis

Question 8

Question
Which muscle is innervated by S2-S4 nerve roots?
Answer
  • gastrocnemius
  • anal sphincter

Question 9

Question
When recording a TOF from the median nerve at the wrist, which muscle would be best to record the response?
Answer
  • abductor pollicus brevis
  • flexor carpi radialis

Question 10

Question
If there is traction on neural tissues during a surgery, it will result in:
Answer
  • train activity in EMG
  • delayed latency and a drop in amplitude for SSEP

Question 11

Question
What is the nerve innervation of the peroneus longus muscle?
Answer
  • L2, L3, L4
  • L5, S1 , S2

Question 12

Question
Stimulation of an L4 pedicle screw that has a lateral cortical bone breach will create a CMAP response in which muscle?
Answer
  • tibialis anterior
  • abductor hallucis

Question 13

Question
What is resected during a rhizotomy procedure?
Answer
  • dorsal rootlets
  • sensory nerve

Question 14

Question
When is a monopolar stimulator preferred over a bipolar stimulator
Answer
  • when localizing the general path of the nerve through a tumor
  • when localizing the nerve

Question 15

Question
Which type of s-EMG activity correlates with nerve injury and postoperative deficit?
Answer
  • burst activity
  • neurotonic discharges

Question 16

Question
If you observe s-EMG activity in all channels, it is probably due to:
Answer
  • nerve root irritation
  • the patient waking up

Question 17

Question
The pedicle screw stimulation probe should be plugged into which output of the stimulator box?
Answer
  • anode
  • cathode

Question 18

Question
A very high threshold for all pedicle screws could be because of a:
Answer
  • muscle relaxant
  • burst suppression

Question 19

Question
The release of a tethered cord is performed by the identifying and sectioning of the:
Answer
  • cauda equina
  • filum terminale

Question 20

Question
Stimulation of dorsal rootlets for dorsal root rhizotomy is done with a stimulation frequency of:
Answer
  • 50.0 Hz
  • 2.79 Hz

Question 21

Question
Luque rods would best be used for:
Answer
  • hip joint replacement
  • posterior spinal fixation

Question 22

Question
Lower motor neurons exit the spinal cord through the:
Answer
  • dorsal nerve roots
  • ventral nerve roots

Question 23

Question
The C8 nerve root exits the spinal cord at which level?
Answer
  • below the C8 vertebrae
  • above the T1 vertebrae

Question 24

Question
The tapered tip of the spinal cord is also known as the:
Answer
  • conus medullaris
  • cauda equina

Question 25

Question
Many nerve roots that exit at the lower part of spinal cord are called:
Answer
  • spina bifida
  • cauda equine

Question 26

Question
The ulnar nerve root entry level is:
Answer
  • C8-T1
  • C5-C8

Question 27

Question
The median nerve root entry level is:
Answer
  • C5-T1
  • C5-C8

Question 28

Question
The posterior tibial nerve root entry level is:
Answer
  • L4-S3
  • L3-S4

Question 29

Question
Tibial and common peroneal nerves are braches of the:
Answer
  • femoral nerve
  • sciatic Nerve

Question 30

Question
The integrity of a peripheral nerve can be determined by:
Answer
  • proximal CMAP responses
  • distal CMAP responses

Question 31

Question
What is the most appropriate drug to use at induction when monitoring s-EMG?
Answer
  • curare
  • succinyl-choline

Question 32

Question
A train activity may be seen by:
Answer
  • cold irrigation
  • warm irrigation

Question 33

Question
A metal artifact is seen when:
Answer
  • a metal instrument touches the nerve directly
  • two dissimilar metals touch each other in the exposed spine

Question 34

Question
What type of corrective force to the spinal column is applied when sublaminar wires are used?
Answer
  • fixation
  • translation

Question 35

Question
The effects of a Harrington rod distraction on the spinal cord can be tested by a:
Answer
  • stagnara wake up test
  • dorsal root stimulation

Question 36

Question
Which of the following is true for a possible nerve root injury when monitoring sEMG?
Answer
  • high frequency train firing lasting for more than one minute
  • few large bursts responses of complex morphology

Question 37

Question
The recommended band-pass filter for EMG monitoring is:
Answer
  • 10-5000
  • 10-30 to 16000

Question 38

Question
EMG monitoring for the S1 nerve root will include:
Answer
  • sartorius
  • gastrocnemius

Question 39

Question
A compression or sustained traction of a nerve will be present in s-EMG as:
Answer
  • train activity
  • burst activity

Question 40

Question
The anterior horn cells are also called:
Answer
  • beta motor neurons
  • alpha motor neurons

Question 41

Question
There are _ cervical , _ thoracic, __ lumbar, and _ sacral spinal nerves in the human body.
Answer
  • 7, 12, 5,5
  • 8, 12, 5,5

Question 42

Question
Foot drop is caused by an injury to the:
Answer
  • peroneal nerve
  • femoral nerve

Question 43

Question
If 3 out of 4 twitches are present during TOF monitoring, what percentage of muscles are paralyzed?
Answer
  • 25%
  • 75%

Question 44

Question
Wrist drop is caused by an injury to the:
Answer
  • median nerve
  • radial nerve

Question 45

Question
Radicular arteries can be compromised by:
Answer
  • derotation
  • pedicle screw fixation

Question 46

Question
the pudendal nerve arises from:
Answer
  • S2-S4
  • S1-S2

Question 47

Question
CMAP is a:
Answer
  • nerve action potential
  • myogenic response

Question 48

Question
Bipolar nerve stimulation is MORE:
Answer
  • sensitive
  • specific

Question 49

Question
Monopolar nerve stimulation is LESS:
Answer
  • sensitive
  • specific

Question 50

Question
A lumbar pedicle screw with a cortical bone breach will have a threshold of:
Answer
  • 5 mA
  • 20 mA
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