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CNIM exam 4 Questions and Answers with Complete Solutions | 100% Verified
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CNIM exam 4 Questions and Answers with Complete Solutions | 100% Verified
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CNIM exam 4 Questions and Answers withComplete Solutions | 100% Verified
4. If an amplifier is rated as having 120dB common mode rejection ratio, which of
the following ratios of in-phase to
out-of-phase signals would be expected?
10,000:1
100,000:1
500,000:1
1,000,000:1 - ANSWER 1,000,000:1
7. Which of the following opposes any change in current?
Capacitance
Impedance
Inductance
Resistance - ANSWER Inductance
The ability of an inductor to store energy in the form of a magnetic field (and
consequently to oppose changes in current) is called inductance.
. Which of the following electrode materials has little electrode potential drift and
a
long time constant?
Tin
Gold
Silver
,Stainless steel - ANSWER Gold
With referential recording, maximal amplitude cortical evoked potentials following
stimulation of the left posterior
tibial nerve usually would be found between:
C3 and Cz
C4 and P4
Fz and Cz
C4 and Cz - ANSWER C3 and Cz
Contralateral
medial cortex
directs the
P37 toward
ipsilateral
scalp (CPz and CPi)
Which of the following will best record the P37 peak following left posterior tibial
nerve stimulation?
CP3
CP4
Fpz
C5S - ANSWER CP3
, Contralateral
medial cortex
directs the
P37 toward
ipsilateral
scalp (CPz and CPi)
Identification of wave V of the BAEP may require
Tympanic electrodes
Bilateral stimulation
Decreasing stimulus intensity
Use of a noncephalic reference - ANSWER Decreasing stimulus intensity.
Identification of wave V may require decreasing stim intensity. Decreasing
intensity will cause an increase in latency making it easier to identify from wave IV.
What is the most likely effect of isoflurane at MAC 1.5 on tibialis anterior CMAP
amplitude in response to spinal
stimulation?
Marked increase
Marked decrease
Minimal decrease
Minimal increase - ANSWER Marked decrease because stimulus is on spinal
cord above alpha motor neuron meaning a synapse still needs to take place.
Synapses are highly affected by anesthesia. Stimulating on a peripheral nerve
would have little impact because no synapse.
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