CNIM Practice Exam 1 Questions and Answers All Correct
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Course
CNIM
Institution
CNIM
CNIM Practice Exam 1 Questions and Answers All Correct
The primary risk to the spinal cord during Luque instrumentation is: - Answer- Placement of wires
When no phase reversal is present in an anterior-posterior cortical grid recording: - Answer- The maximum amplitude response is closest to th...
CNIM Practice Exam 1 Questions
and Answers All Correct
The primary risk to the spinal cord during Luque instrumentation is: - Answer-
Placement of wires
When no phase reversal is present in an anterior-posterior cortical grid recording: -
Answer- The maximum amplitude response is closest to the central sulcus
Which one of the following is an excitatory neurotransmitter? - Answer- Glutamate
The layers of protective tissue which surround the central nervous system are called: -
Answer- Meninges
The median nerve is an excellent mearure of: - Answer- Cerebral blood flow
Pre-operative baseline evaluation is not indicated for which of the following modalities? -
Answer- Facial nerve EMG
A loss of SSEP response would most likely occur ________ to the surgical site. -
Answer- Rostral
Stimulation of the Peroneal nerve is performed: - Answer- Across the head of the fibula
If the bin width of you system is 20 μS, then the highest frequency signal that can be
resolved is: - Answer- 25 KHz
Your initial signal amplitude is 0.5 μV inside a background noise of 2 μV, what will the
signal to noise ratio be after 400 averages? - Answer- 5
What is the required horizontal resolution of an evoked potential system? - Answer- 20
μS per data point of less
The primary risk associated with sublaminar wire placement is:? - Answer- Dorsal
column injury
Upper extremity SEPs transmit through which spinal cord tract? - Answer- Fasciculus
cuneatus
, The interconnecting blood vessels at the base of the brain make up: - Answer- Circle of
Willis
The Trigeminal nerve EMG response has a latency of approximately: - Answer- 3-5
msec
A decrease in the power spectral edge indicates: - Answer- A greater proportion of EEG
power at the lower frequencies
What is the advantage of using bipolar recording pairs for monitoring of cranial nerve
spontaneous EMG? - Answer- Avoids far-field recording of nearby muscle activity
If you have a small signal with a lot of noise what should you do to help resolve your
signal? - Answer- Increase your averages
What might be monitored for a jugular bulb tumor surgery? - Answer- CN VII-XII
Which of the following will result in significantly elevated SSEP latencies? - Answer-
Charcot-Marie Tooth disease
Which of the following is most likely associated with abnormal posterior tibial SEPs? -
Answer- Romberg sign
ABR condesation clicks from the transducer causes: - Answer- Movement of the
tympanic membrane toward the cochlea
During electrocautery we should: - Answer- Pause recording
The Auditory Evoked Potential (ABR) typically involves what type of stimulus? - Answer-
Click sound
A 10 Hz signal passing through a 10 Hz locut filter will be: - Answer- Reduced in
amplitude by approximately 30%
The Sodium-Potassium pump: - Answer- Pumps K into the cell and Na out of the cell
What is the maximum allowable chassis leakage current? - Answer- 0.1 mA
Neurotonic discharges of facial nerve indicate: - Answer- Possible compromise of facial
nerve
According to the Guidelines, what are the optimal filter settings for recording ABRs? -
Answer- 10-30 Hz to 2500-3000 Hz
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