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
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
