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Certificate Practice Quizzes Quiz on EMG, created by eds neuro on 10/03/2016.

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EMG

EMG

Question 1 of 50

1

When recording a TOF from the posterior tibial nerve at the ankle, which muscle would be best to record the response?

Select one of the following:

  • tibalis anterior

  • abductor hallucis

Explanation

Question 2 of 50

1

The best muscles for L4-S1 pedicle screw stimulation would be the:

Select one of the following:

  • tibialis anterior and gastrocnemius

  • vastus medialis and biceps femoris

Explanation

Question 3 of 50

1

The best muscle to record S-EMG for an S2-S4 instrumentation procedure is the:

Select one of the following:

  • tibialis anterior

  • anal sphincter

Explanation

Question 4 of 50

1

Which procedure may be done to reduce muscle spasticity?

Select one of the following:

  • selective dorsal root rhizotomy

  • mediolateral cordotomy

Explanation

Question 5 of 50

1

Which muscle is innervated by L4-S1 nerve roots?

Select one of the following:

  • iliopsoas

  • tibialis anterior

Explanation

Question 6 of 50

1

Which muscle is innervated by the C5 nerve root?

Select one of the following:

  • deltoid

  • pronator teres

Explanation

Question 7 of 50

1

Which muscle is innervated by the C7 nerve root?

Select one of the following:

  • triceps brachii

  • rectus abdominis

Explanation

Question 8 of 50

1

Which muscle is innervated by S2-S4 nerve roots?

Select one of the following:

  • gastrocnemius

  • anal sphincter

Explanation

Question 9 of 50

1

When recording a TOF from the median nerve at the wrist, which muscle would be best to record the response?

Select one of the following:

  • abductor pollicus brevis

  • flexor carpi radialis

Explanation

Question 10 of 50

1

If there is traction on neural tissues during a surgery, it will result in:

Select one of the following:

  • train activity in EMG

  • delayed latency and a drop in amplitude for SSEP

Explanation

Question 11 of 50

1

What is the nerve innervation of the peroneus longus muscle?

Select one of the following:

  • L2, L3, L4

  • L5, S1 , S2

Explanation

Question 12 of 50

1

Stimulation of an L4 pedicle screw that has a lateral cortical bone breach will create a CMAP response in which muscle?

Select one of the following:

  • tibialis anterior

  • abductor hallucis

Explanation

Question 13 of 50

1

What is resected during a rhizotomy procedure?

Select one of the following:

  • dorsal rootlets

  • sensory nerve

Explanation

Question 14 of 50

1

When is a monopolar stimulator preferred over a bipolar stimulator

Select one of the following:

  • when localizing the general path of the nerve through a tumor

  • when localizing the nerve

Explanation

Question 15 of 50

1

Which type of s-EMG activity correlates with nerve injury and postoperative deficit?

Select one of the following:

  • burst activity

  • neurotonic discharges

Explanation

Question 16 of 50

1

If you observe s-EMG activity in all channels, it is probably due to:

Select one of the following:

  • nerve root irritation

  • the patient waking up

Explanation

Question 17 of 50

1

The pedicle screw stimulation probe should be plugged into which output of the stimulator box?

Select one of the following:

  • anode

  • cathode

Explanation

Question 18 of 50

1

A very high threshold for all pedicle screws could be because of a:

Select one of the following:

  • muscle relaxant

  • burst suppression

Explanation

Question 19 of 50

1

The release of a tethered cord is performed by the identifying and sectioning of the:

Select one of the following:

  • cauda equina

  • filum terminale

Explanation

Question 20 of 50

1

Stimulation of dorsal rootlets for dorsal root rhizotomy is done with a stimulation frequency of:

Select one of the following:

  • 50.0 Hz

  • 2.79 Hz

Explanation

Question 21 of 50

1

Luque rods would best be used for:

Select one of the following:

  • hip joint replacement

  • posterior spinal fixation

Explanation

Question 22 of 50

1

Lower motor neurons exit the spinal cord through the:

Select one of the following:

  • dorsal nerve roots

  • ventral nerve roots

Explanation

Question 23 of 50

1

The C8 nerve root exits the spinal cord at which level?

Select one of the following:

  • below the C8 vertebrae

  • above the T1 vertebrae

Explanation

Question 24 of 50

1

The tapered tip of the spinal cord is also known as the:

Select one of the following:

  • conus medullaris

  • cauda equina

Explanation

Question 25 of 50

1

Many nerve roots that exit at the lower part of spinal cord are called:

Select one of the following:

  • spina bifida

  • cauda equine

Explanation

Question 26 of 50

1

The ulnar nerve root entry level is:

Select one of the following:

  • C8-T1

  • C5-C8

Explanation

Question 27 of 50

1

The median nerve root entry level is:

Select one of the following:

  • C5-T1

  • C5-C8

Explanation

Question 28 of 50

1

The posterior tibial nerve root entry level is:

Select one of the following:

  • L4-S3

  • L3-S4

Explanation

Question 29 of 50

1

Tibial and common peroneal nerves are braches of the:

Select one of the following:

  • femoral nerve

  • sciatic Nerve

Explanation

Question 30 of 50

1

The integrity of a peripheral nerve can be determined by:

Select one of the following:

  • proximal CMAP responses

  • distal CMAP responses

Explanation

Question 31 of 50

1

What is the most appropriate drug to use at induction when monitoring s-EMG?

Select one of the following:

  • curare

  • succinyl-choline

Explanation

Question 32 of 50

1

A train activity may be seen by:

Select one of the following:

  • cold irrigation

  • warm irrigation

Explanation

Question 33 of 50

1

A metal artifact is seen when:

Select one of the following:

  • a metal instrument touches the nerve directly

  • two dissimilar metals touch each other in the exposed spine

Explanation

Question 34 of 50

1

What type of corrective force to the spinal column is applied when sublaminar wires are used?

Select one of the following:

  • fixation

  • translation

Explanation

Question 35 of 50

1

The effects of a Harrington rod distraction on the spinal cord can be tested by a:

Select one of the following:

  • stagnara wake up test

  • dorsal root stimulation

Explanation

Question 36 of 50

1

Which of the following is true for a possible nerve root injury when monitoring sEMG?

Select one of the following:

  • high frequency train firing lasting for more than one minute

  • few large bursts responses of complex morphology

Explanation

Question 37 of 50

1

The recommended band-pass filter for EMG monitoring is:

Select one of the following:

  • 10-5000

  • 10-30 to 16000

Explanation

Question 38 of 50

1

EMG monitoring for the S1 nerve root will include:

Select one of the following:

  • sartorius

  • gastrocnemius

Explanation

Question 39 of 50

1

A compression or sustained traction of a nerve will be present in s-EMG as:

Select one of the following:

  • train activity

  • burst activity

Explanation

Question 40 of 50

1

The anterior horn cells are also called:

Select one of the following:

  • beta motor neurons

  • alpha motor neurons

Explanation

Question 41 of 50

1

There are _ cervical , _ thoracic, __ lumbar, and _ sacral spinal nerves in the human body.

Select one of the following:

  • 7, 12, 5,5

  • 8, 12, 5,5

Explanation

Question 42 of 50

1

Foot drop is caused by an injury to the:

Select one of the following:

  • peroneal nerve

  • femoral nerve

Explanation

Question 43 of 50

1

If 3 out of 4 twitches are present during TOF monitoring, what percentage of muscles are paralyzed?

Select one of the following:

  • 25%

  • 75%

Explanation

Question 44 of 50

1

Wrist drop is caused by an injury to the:

Select one of the following:

  • median nerve

  • radial nerve

Explanation

Question 45 of 50

1

Radicular arteries can be compromised by:

Select one of the following:

  • derotation

  • pedicle screw fixation

Explanation

Question 46 of 50

1

the pudendal nerve arises from:

Select one of the following:

  • S2-S4

  • S1-S2

Explanation

Question 47 of 50

1

CMAP is a:

Select one of the following:

  • nerve action potential

  • myogenic response

Explanation

Question 48 of 50

1

Bipolar nerve stimulation is MORE:

Select one of the following:

  • sensitive

  • specific

Explanation

Question 49 of 50

1

Monopolar nerve stimulation is LESS:

Select one of the following:

  • sensitive

  • specific

Explanation

Question 50 of 50

1

A lumbar pedicle screw with a cortical bone breach will have a threshold of:

Select one of the following:

  • 5 mA

  • 20 mA

Explanation

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