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CNIM Exam 3 Questions And 100% Correct Answers
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CNIM Exam 3 Questions And 100% Correct AnswersFor median nerve stimulation, the cathode is placed - ANSWER Between the tendons of
palmaris longus and flexor carpi radialis muscle
Of the following, the peak equivalent (pe) SPL of a click should be calibrated at: -
ANSWER 1000Hz
A grounded device must be available so that, under normal conditions, no voltage
greater than ____ is measured across an impedance of 1000 Ohms - ANSWER 10 mV
RMs at 50Hz
If the BAEP contains unavoidable muscle artifact you can adjust the locut filter to: -
ANSWER 200Hz
Which following response is most highly dependent on the precision of electrode
placement on the scalp? - ANSWER P37 of the PTN SSEP
If the ear canal is occluded, you may expect: - ANSWER Prolongation of all wave
latencies.
Of those patients who demonstrate significant EEG changes following cross clamping of
the carotid, the majority of changes will occur within: - ANSWER 20 Seconds
What would the effect be of fluid in the external auditory canal? - ANSWER Increase of
absolute latencies
A goal of intraoperative monitoring of the sensory pathways is to - ANSWER detect
abnormalities.
, When recording EEG using bipolar montage, the localizing sign is - ANSWER a PHASE
REVERSAL between adjacent channels having a common electrode.
Brain activity recorded directly from the cortex, ECOG, is very high in amplitude and
usually requires sensitivities in the range of - ANSWER 40 to 100 uV/mm
To record the compound action potential to the median nerve intra-operatively, the
electrode should be placed at: - ANSWER The antecubital fossa
The earliest obligate component of the median nerve SSEP that is measured far-field is
generated in the - ANSWER Medial lemniscus
The PTN arises from which branch of the sciatic nerve? - ANSWER Superior tibial
Eliciting a motor twitch with the PTN stimulation you would expect to see: - ANSWER
Plantar flexion of the toes
Utilizing a montage that includes C5 spine to Fpz, with lower extremity stimulation, the
expected response is generated at the - ANSWER Caudal medial lemniscus and it is a
far-field response.
To record cortical SSEPs during intraoperative monitoring of the thoracolumbar spinal
cord, an electrode should be placed - ANSWER 2cm posterior to C3 and C4
A patient who is in a state of surgical anesthesia using nitrous oxide is likely to have a
drop in SSEP amplitudes of - ANSWER 75%
Changing the low cut filter of a BAEP from 100 to 200 Hz will have the effect of: -
ANSWER Decrease response latency
Severe hypotension can have which of the following effects on the evoked potential? -
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