CNIM Practice Exam 1 With Complete Solution 2024-2025
Which of the following is least likely to cause electrical interference in the operating
room? - ANSWER The pneumatic drill
If the monitoring instrument develops an inability to average, steps to take would
include all the following except:? - ANSWER Consult with the anesthesiologist
anesthesia changes
Lying between the adjacent surfaces of the vertebral bodies and bonding them together,
are the: ? - ANSWER Intervertebral discs
Where do the dorsal column pathways synapse en route to the sensory cortex? -
ANSWER Nucleus cuneatus and thalamus
Where should the ground electrodes for SSEP recordings be placed? - ANSWER They
are best placed between the stimulation and recording electrodes.
What can cause a significant reduction in amplitude of ABR wave V? - ANSWER
Intravenous lidocaine
Although the use of electrical cautery can obliterate EP waveforms, intraoperative
monitoring should be continued? - ANSWER By monitoring the raw (unaveraged) data
The effects of halogenated agents on the cortical somatosensory evoked potentials are?
- ANSWER An increase in latencies and a decrease in amplitudes
The area of greatest risk for ischemic injury during carotid endarterectomy is? -
ANSWER The middle cerebral artery
,Which of the following would most likely reflect sustained traction or compression of a
nerve during EMG? - ANSWER A "train" response
Delta activity in awake adults with eyes is usually? - ANSWER Abnormal
Delta activity in awake adults with eyes open is usually? - ANSWER Abnormal
EP waveforms contralateral to the surgical site are monitored to differentiate between?
- ANSWER systematic changes and local manipulation
SSEPs are most likely to be highly variable and less reliable in patients with? - ANSWER
Neuromuscular disease
The effects of Harrington rod distraction on the spinal cord can be tested by all of the
following except? - ANSWER Dorsal root stimulation
The input impedance of a differential amplifier must be at least - ANSWER 10 megaohms
The input impedance of a differential amplifier must be at least - ANSWER 10 mega ohms
which is not true of hyperperfusion during carotid endarterectomy? - ANSWER It is most
easily detected by EEG
Babinski's sign is: - ANSWER Plantar extension of the hallux when the sole of the foot is
stroked
Spondylosis is: - ANSWER Degeneration of the spine
- ANSWER A spontaneous emg response
, - ANSWER A response to EMG stimulation with an electrical probe
Identification of wave V of the BAEP may require? - ANSWER Decreasing stimulus
intensity
Excitation of the postsynaptic neuron is caused by the neurotransmitter? - ANSWER
Glutamate
Generally speaking, rate increases above 30 per second in BAEP studies? - ANSWER
Will increase the latency and decrease the amplitude of the BAEP
Crippling spasticity due to multiple sclerosis, spinal cord injury, and brain trauma has
been alleviated in some patients following:? -ANSWER Selective dorsal rhizotomy
Artifact most likely associated with blood warming equipment is? - ANSWER 60 Hz
Drop in SSEP amplitudes may drop as much as _________% in a patient in a state of
surgical anesthesia using nitrous oxide - ANSWER 75%
This is the preferred site of recording for the cervical cord response to median nerve
stimulation:? - ANSWER C5
For a microvascular decompression of the Vth nerve you would monitor the? - ANSWER
Masseter
The intraoperative BAEP is most likely to be obscured by? - ANSWER Muscle artifact
The phenomenon called "aliasing"? - ANSWER Refers to an erroneous representation of
an analog signal by digital values
Which of the following is least likely to cause electrical interference in the operating
room? - ANSWER The pneumatic drill
If the monitoring instrument develops an inability to average, steps to take would
include all the following except:? - ANSWER Consult with the anesthesiologist
anesthesia changes
Lying between the adjacent surfaces of the vertebral bodies and bonding them together,
are the: ? - ANSWER Intervertebral discs
Where do the dorsal column pathways synapse en route to the sensory cortex? -
ANSWER Nucleus cuneatus and thalamus
Where should the ground electrodes for SSEP recordings be placed? - ANSWER They
are best placed between the stimulation and recording electrodes.
What can cause a significant reduction in amplitude of ABR wave V? - ANSWER
Intravenous lidocaine
Although the use of electrical cautery can obliterate EP waveforms, intraoperative
monitoring should be continued? - ANSWER By monitoring the raw (unaveraged) data
The effects of halogenated agents on the cortical somatosensory evoked potentials are?
- ANSWER An increase in latencies and a decrease in amplitudes
The area of greatest risk for ischemic injury during carotid endarterectomy is? -
ANSWER The middle cerebral artery
,Which of the following would most likely reflect sustained traction or compression of a
nerve during EMG? - ANSWER A "train" response
Delta activity in awake adults with eyes is usually? - ANSWER Abnormal
Delta activity in awake adults with eyes open is usually? - ANSWER Abnormal
EP waveforms contralateral to the surgical site are monitored to differentiate between?
- ANSWER systematic changes and local manipulation
SSEPs are most likely to be highly variable and less reliable in patients with? - ANSWER
Neuromuscular disease
The effects of Harrington rod distraction on the spinal cord can be tested by all of the
following except? - ANSWER Dorsal root stimulation
The input impedance of a differential amplifier must be at least - ANSWER 10 megaohms
The input impedance of a differential amplifier must be at least - ANSWER 10 mega ohms
which is not true of hyperperfusion during carotid endarterectomy? - ANSWER It is most
easily detected by EEG
Babinski's sign is: - ANSWER Plantar extension of the hallux when the sole of the foot is
stroked
Spondylosis is: - ANSWER Degeneration of the spine
- ANSWER A spontaneous emg response
, - ANSWER A response to EMG stimulation with an electrical probe
Identification of wave V of the BAEP may require? - ANSWER Decreasing stimulus
intensity
Excitation of the postsynaptic neuron is caused by the neurotransmitter? - ANSWER
Glutamate
Generally speaking, rate increases above 30 per second in BAEP studies? - ANSWER
Will increase the latency and decrease the amplitude of the BAEP
Crippling spasticity due to multiple sclerosis, spinal cord injury, and brain trauma has
been alleviated in some patients following:? -ANSWER Selective dorsal rhizotomy
Artifact most likely associated with blood warming equipment is? - ANSWER 60 Hz
Drop in SSEP amplitudes may drop as much as _________% in a patient in a state of
surgical anesthesia using nitrous oxide - ANSWER 75%
This is the preferred site of recording for the cervical cord response to median nerve
stimulation:? - ANSWER C5
For a microvascular decompression of the Vth nerve you would monitor the? - ANSWER
Masseter
The intraoperative BAEP is most likely to be obscured by? - ANSWER Muscle artifact
The phenomenon called "aliasing"? - ANSWER Refers to an erroneous representation of
an analog signal by digital values
