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Cnim Test 2 Questions And Answers With Verified Solutions Already Passed!!!(GRADED A+)
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Cnim Test 2 Questions And Answers With Verified Solutions Already Passed!!!(GRADED A+)
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Cnim Test 2 Questions And AnswersWith Verified Solutions Already
Passed!!!(GRADED A+)
Instrumentation systems used to distract, compress, and de-rotate the spine to
restore normal vertebral column alignment, include: - ANSWER✔✔ Cotrel-
Dubousset and ISOLA
The resting membrane potential is created by differences between the inside and
outside of the cell in ion concentrations of - ANSWER✔✔ K+, Na+, and Cl-
If all channels are showing excessive 60 Hz noise, what should you do? -
ANSWER✔✔ Check your ground impedance
A grounding device must be available so that, under normal conditions, no
voltage greater than is measured across an impedance of 1000 ohms -
ANSWER✔✔ 20 mV rms at 60 Hz
For median nerve stimulation, the cathode is placed - ANSWER✔✔ between the
tendons of palmaris longus and flexor carpi radialis muscle
Sensation level (SL) is defined by - ANSWER✔✔ An individual's hearing threshold
When using a bipolar montage during EEG recording, the localizing sign is -
ANSWER✔✔ A phase reversal between adjacent channels having a common
electrode
,When is the latest acceptable time during a surgery to begin monitoring? -
ANSWER✔✔ Before any surgical manipulations which place neural structure at
risk
How many waves of a 60 Hz signal should you see in a 100 msec sweep? -
ANSWER✔✔ 6
A goal of intraoperative monitoring of the sensory pathways is to - ANSWER✔✔
detect abnormalities (electrophysiologic changes) that develop as the recordings
are taken
The use of ER insert earphones results in - ANSWER✔✔ separating wave 1 from
the stimulus artifact
Sublaminar wires are typically used to apply what type of corrective force to the
spinal column? - ANSWER✔✔ translation
The recommended criteria for surgeon notification when monitoring BAEPs
intraoperatively include an increase in - ANSWER✔✔ the latency of wave V of
>1.0 msec or the disappearance of wave V
The ulnar nerve originates from nerve roots at - ANSWER✔✔ C7-T1
If you observe a significant change in the responses what is the first think you
must do? - ANSWER✔✔ Inform the surgeon
,Direct focal electrical stimulation of a peripheral nerve lesion will - ANSWER✔✔
more precisely localize the distribution of intact conducting nerve fibers
Spondylolisthesis - ANSWER✔✔ vertebral displacement
Synaptic transmission, and/or changes in the thalamocortical projections, are
believed to produce - ANSWER✔✔ cortical potentials
For spinal cord monitoring using SSEPs, epidural electrodes should be placed: -
ANSWER✔✔ rostral to the surgical site
Which of the following potentials will reverse the click polarity? - ANSWER✔✔
Cochlear microphonic
An optimal repetition rate for intraoperative BAEPs is: - ANSWER✔✔ 31 Hz
Signal to noise ratio relates to which of the following? - ANSWER✔✔ The
amplitude of the evoked response components to the amplitude of the unrelated
components
What significant EEG change would you expect to see with ischemia due to
carotid clamping - ANSWER✔✔ Increased slow activity
Nerves of the body, such as the ulnar, median, and femoral, are formed from the -
ANSWER✔✔ dorsal and ventral rami
, which of the following will most likely result in abnormal PTN responses? -
ANSWER✔✔ Positive babinski sign
A 60 Hz artifact will most likely be caused by: - ANSWER✔✔ Microscope
During scoliosis surgery, the spinal cord is most at risk for injury - ANSWER✔✔
during spinal distraction and sublaminar wiring
When monitoring somatosensory evoked potentials during a critical moment in
an intraoperative study, changing the setting of the high-frequency filter -
ANSWER✔✔ may lead to a false interpretation of the data
The purpose of preoperative evoked potential testing is to - ANSWER✔✔
compare to post-induction responses
Facial nerve EMG responses are best recorded from - ANSWER✔✔ orbicularis oris
and orbicularis oculi muscles
Severe hypothermia - ANSWER✔✔ increases evoked potential latencies
Functional cortical stimulation is used to localize brain areas that must be -
ANSWER✔✔ preserved during resection
Electrode gel in between anode and cathode of the stimulating electrodes results
in: - ANSWER✔✔ salt bridge
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