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CNIM exam with correct answers 2024

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CNIM exam with correct answers 2024

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  • June 23, 2024
  • 21
  • 2023/2024
  • Exam (elaborations)
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CNIM exam with correct answers 2024

During electrocautery you should... - ANSWER: ✔✔Pause Recording



SSEPs are less reliable in patients with... - ANSWER: ✔✔Neuromuscular disease



After-discharges occur after what? - ANSWER: ✔✔Direct cortical stimulation



In order to reduce stimulus artifact, the ground electrode shoudl be placed... - ANSWER: ✔✔On the
limb between the stimulating and recording electrodes



Which of the following is the most effected by halogenated agents? - ANSWER: ✔✔Posterior Tibial
cortical potential



The nerve roott entry levels for the ulnar nerve are.. - ANSWER: ✔✔C8-T1



When doing a C5 decompression involving the axillary nerve which muscle should you record from? -
ANSWER: ✔✔Deltoid



Train stimuli are used for TcMEP's in order to... - ANSWER: ✔✔Overcome anesthetic suppression of
synaptic transmissions in the motor pathway



What is the preferred alternate when the PTN is unavailable? - ANSWER: ✔✔Peroneal



Nyquist Frequency - ANSWER: ✔✔One half the frequency of the recorded signal



A decrease in the power spectral edge indicates.. - ANSWER: ✔✔a greater proportion of EEG power at
the lower frequencies

,Why do we use electrodes with the same metals? - ANSWER: ✔✔To prevent electrode polarization



Which of the following drugs has an appreciable effect on peripheral nerve APs - ANSWER: ✔✔none



Which one of the following is an inhibitory neurotransmitter - ANSWER: ✔✔GABA



Stimulating the median nerve at the wrist yields an Erbs point response at 10ms and an CV of 60m/s.
What is the distance between the cathode and the Erb's point recording electrode - ANSWER: ✔✔60cm



What are SSEP and MEP used simultaneously? - ANSWER: ✔✔Spinal cord damage can occur in only one
tract causing loss of MEp but not SSEP



Common Mode Rejection - ANSWER: ✔✔Is the cancellation of signals that are common to both inputs
of the ampifier



Ankylosis - ANSWER: ✔✔Fused Joint



Where is the ABR wave V generated? - ANSWER: ✔✔Mdbrain



If you cannot replace an electrode that has come out during surgery you? - ANSWER: ✔✔use a
duplicate



A patient with the temperature of 30 debrees C will have - ANSWER: ✔✔increased latencies



Which would not be considered contamination of the sterile field - ANSWER: ✔✔reaching underneath
the surgeon's gown to grab his pager



Personal Protection Devices (PPDs) consist of - ANSWER: ✔✔gloves, masks, gowns



When an electrode fall on the floor you - ANSWER: ✔✔you immediately pick it up to dispose of it in a
sharps container

, when testing BAEP's you get a wave I on your contralateral ear montage. What do you do? - ANSWER:
✔✔Check ear phones for porper side stimulation



When no phase reversal is present in an anterior-posterior cortical grid recording - ANSWER: ✔✔The
maximum amplitude response is closest to the central sulcus



The Artery of Admkiewicz is - ANSWER: ✔✔a major feeder vessel to the spinal cord



Which of the following is a barbiturate? - ANSWER: ✔✔Methohexital



Which electrode is regarded as an effective stimulator during facial nerve recordings? - ANSWER:
✔✔Bipolar concentric EMG needle



The primary risk associated with sublaminar wire placement is - ANSWER: ✔✔Dorsal column injury



One of the risks of a wake up test is? - ANSWER: ✔✔Accidental extubation



A 60Hz artifact would most likely be caused by: - ANSWER: ✔✔Infusion Pump



Your initial signal is 0.5microV inside a background noise of 2microV. What will the signal to noise ratio
be after 400 averages? - ANSWER: ✔✔5



What is not an advantage of epidural recording? - ANSWER: ✔✔absence of significant artifact



When securing PTN stimulators you want to make sure - ANSWER: ✔✔the anode is distal to the cathode



which of thefolowing is most consistent with a discrete lesion of the medial geniculate body? - ANSWER:
✔✔No changes in waves I-V

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