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ASET CNIM Exam Questions and Answers Latest Update., Exams of Nursing

Walden UniversityNursing

ASET CNIM Exam Questions and Answers Latest Update.

Typology: Exams

2024/2025

Available from 07/14/2025

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ASET CNIM Exam Questions and Answers
Latest Update
Resting membrane potential is created by differences between the inside and
outside of the cell in ion concentrations of
1.
K+
2.
K+ and Ca++
3.
K+, Na+ and Cl-
4.
Na+, Ca++ and Cl- - Answer K+, Na+, and Cl-
Excitation of the postsynaptic neuron is caused by the neurotransmitter
1.
gamma amino butyric acid
2.
glycine
3.
para amino butyric acid
4.
glutamate - Answer Glutamate
Wave III of the BAER is generated by the
1.
superior olivary complex
2.
inferior colliculus
3.
lateral lemniscus
4.
medial geniculate - Answer Superior olivary complex
Lying between the adjacent surfaces of the vertebral bodies and bonding them
together, are the
1.
pedicles
2.
intervertebral discs
3.
supraspinous ligaments
4.
spinal nerves - Answer Intervertebral discs
Which of the following UE SSEP response is considered a "stationary potential"
1.
N20
2.
N13
3.
P14
4.
N18 - Answer N13
The initial waveform recorded of a near-field potential is
1.
always obscured by stimulus artifact
2.
negative due to depolarization of membrane potentials
3.
positive due to electronic depolarization of the membrane under the recording
electrode
pf3
pf4
pf5
pf8
pf9
pfa
pfd
pfe
pff
pf12
pf13
pf14
pf15
pf16
pf17
pf18
pf19
pf1a
pf1b
pf1c
pf1d
pf1e
pf1f
pf20

Partial preview of the text

Download ASET CNIM Exam Questions and Answers Latest Update. and more Exams Nursing in PDF only on Docsity!

ASET CNIM Exam Questions and Answers

Latest Update

Resting membrane potential is created by differences between the inside and outside of the cell in ion concentrations of

  1. K+
  2. K+ and Ca++
  3. K+, Na+ and Cl-
  4. Na+, Ca++ and Cl- - Answer K+, Na+, and Cl- Excitation of the postsynaptic neuron is caused by the neurotransmitter
  5. gamma amino butyric acid
  6. glycine
  7. para amino butyric acid
  8. glutamate - Answer Glutamate Wave III of the BAER is generated by the
  9. superior olivary complex
  10. inferior colliculus
  11. lateral lemniscus
  12. medial geniculate - Answer Superior olivary complex Lying between the adjacent surfaces of the vertebral bodies and bonding them together, are the
  13. pedicles
  14. intervertebral discs
  15. supraspinous ligaments
  16. spinal nerves - Answer Intervertebral discs Which of the following UE SSEP response is considered a "stationary potential"
  17. N
  18. N
  19. P
  20. N18 - Answer N The initial waveform recorded of a near-field potential is
  21. always obscured by stimulus artifact
  22. negative due to depolarization of membrane potentials
  23. positive due to electronic depolarization of the membrane under the recording electrode
  1. of very low amplitude due to the significant distance between the generator and recording electrode - Answer Positive due to electrotonic depolarization of the membrane under the recording electrode Nerves of the body, such as the ulnar, median, and femoral, are formed from the
  2. white matter of the spinal cord
  3. dorsal and ventral rami
  4. cervical spinal cord
  5. ventral ganglion - Answer Dorsal and ventral rami On the SSEP, the electrode at _ _ records a spinal cord response
  6. T
  7. CPz
  8. the iliac crest
  9. the popliteal fossa - Answer T Projecting laterally from the junction of the pedicle and lamina and serving as a lever for muscle and ligaments, are the
  10. intervertebral discs
  11. mamillary processes
  12. intervertebral foramen
  13. transverse processes - Answer Transverse processes Synaptic transmission, and/or changes in the thalamocortical projections, are believed to produce
  14. subcortical potentials
  15. cortical potentials
  16. the erb's point potential
  17. the P100 potential - Answer Cortical potentials The section of the brainstem that is continuous with the spinal cord and includes the decussation of the pyramids, is the
  18. medulla oblongata
  19. pons
  20. dorsal column
  21. midbrain - Answer medulla oblongata The ulnar nerve originates from nerve roots at
  22. C5-C
  23. C6-C
  24. C7-C
  25. C7-T1 - Answer C7-T
  1. deep peroneal nerve
  2. sciatic nerve
  3. lumbar plexus - Answer Sciatic nerve Cortical evoked potentials are largely produced by
  4. depolarization propagated along the nerve fibers
  5. actions potentials of the connecting axonal tracts
  6. EPSPs and IPSPs
  7. high energy magnetic fields of sodium ions within the cell membranes of the brain
  • Answer EPSPs and IPSPs Spinal nerves are attached in series to the sides of the spinal cord and emerge through the
  1. filum terminale
  2. lamina
  3. spinous process
  4. intervertebral discs - Answer Intervertebral foramina The vestibulocochlear nerve (CN VIII) appears
  5. in the groove between the pons and the medulla oblongata
  6. between the cerebellum and C
  7. at the base of the brain near the optic nerves
  8. from the floor of the third ventricle - Answer in the groove between the pons and medulla oblongata P14 is far-field, subcortically generated response which probably reflects
  9. activity from the precentral gyrus
  10. caudal medial lemniscal activity
  11. passage of the afferent volley
  12. a stationary cervical potential - Answer Caudal medial lemniscal activity The facial nerve is cranial nerve and it supplies the muscle for _
  13. V, jaw movement
  14. V, eye movement
  15. VI, facial expression
  16. VII, facial expression - Answer VII, facial expression The BAER measurement of the III-V interpeak interval represents
  17. conduction through the upper-brainstem
  18. conduction of the stimulus through the acoustic nerve
  19. the time it takes for the sound to travel to the auditory cortex
  1. an important tool in assessing cochlear ischemia - Answer Conduction through the upper brainstem A nerve cell membrane can depolarize when
  2. sodium channels are closed and potassium channels are opened
  3. the summation of individual action potentials exceeds the membrane threshold
  4. the resting membrane threshold reaches - 70mV
  5. chloride channels are opened - Answer The summation of individual action potentials exceeds the membrane threshold In a normal adult, stimulation of the median nerve at the wrist will
  6. elicit a primary cortical response at about 20msec
  7. elicit an erb's point response at about 15msec
  8. produce a visible twitch in the abductor hallucis muscle
  9. elicit a cervical response at approximately 18msec - Answer elicit a primary cortical response at about 20msec Because generator sites are typically deep within anatomic structures, most EPs are considered
  10. far-field responses
  11. multi-wave complexes
  12. transient waveforms
  13. steady state potentials - Answer Far-field responses The posterior tibial nerve arises from which branch of the sciatic nerve
  14. superior tibial
  15. superior peroneal
  16. internal popliteal
  17. external popliteal - Answer superior tibial A differential amplifier records
  18. only the first two inputs
  19. the second half the two inputs
  20. the power of the sum of the two inputs
  21. the difference between the two inputs - Answer the difference between the two inputs To accurately represent the amplitude of an EP waveform, a match must be made between the
  22. signal size and the vertical capacity of the digitizer
  23. high-frequency noise and smoothing operation of the instrument
  24. dwell time and sampling rate

Electrode impedance is defined as opposition to

  1. direct current flow
  2. alternating current flow
  3. differential current flow
  4. 60 Hz artifact - Answer alternating current flow A constant voltage stimulator
  5. varies the current in order to maintain a preset voltage level
  6. maintains a constant voltage of 100 volts
  7. varies the output in order to maintain a preset current level
  8. maintains a current level of 10mA - Answer varies the current in order to maintain a preset voltage level The sound stimulus intensity at the tympanic membrane depends on the
  9. acoustic coupling between the sound stimulus generator and the ear
  10. relation between SPL (dB) and the inverse peak equivalent SPL (dB)
  11. relation between SPL (dB) and peak equivalent SPL (dB)
  12. patients hearing threshold (dB) - Answer acoustic coupling between the sound stimulus generator and the ear For the intraoperative recording of EEG, the impedance of a scalp electrode should range from
  13. 250 - 500 ohms
  14. 500 - 1,000 ohms
  15. 1,000 - 5,000 ohms
  16. 5,000 - 10,000 ohms - Answer 1,000-5,000 ohms The use of the 60hz notch filter is discouraged while recording because it can
  17. produce a risk to the patient
  18. produce a ringing activity that can contaminate the appearance of the response
  19. cause the recording electrodes to form a salt bridge
  20. filter slow activity, distorting the response - Answer produce ringing activity that can contaminate the appearance of the response The gain of an amplifier, set to give an output signal of 1 volt for an input signal of 10uV is
  21. 100
  22. 1,
  23. 10,
  24. 100,000 - Answer 100,

The following are examples of good insulating materials, inhibiting current flow

  1. silicon and germanium
  2. silver and copper
  3. glass and rubber
  4. gold and platinum - Answer glass and rubber In selecting the horizontal parameters of analysis, the
  5. sampling rate should be at least two times greater than the highest frequency in the signal
  6. sampling rate should be the equivalent of the highest frequency in the signal
  7. analysis period should be at least twice the Nyquist frequency
  8. analysis period should approach the Nyquist frequency - Answer sampling rate should be at least two times greater than the highest frequency in the signal The phenomenon called aliasing
  9. may be avoided by proper placement of the ground and stimulating electrodes
  10. is common during intraoperative recording of evoked potentials
  11. refers to an erroneous representation of an analog signal by digital values
  12. occurs when the analysis period is more than twice the Nyquist frequency - Answer refers to an erroneous representation of an analog signal by digital values Brain activity recorded directly from the cortex (ECoG) is very high in amplitude and usually requires sensitivities in the range of
  13. 10 to 50 uV/mm
  14. 40 to 100 uV/mm
  15. 100 to 150 uV/mm
  16. 200 to 300 uV/mm - Answer 40 to 100 uV/mm The assumption that responses of excessive amplitude are likely to contain artifact forms the basis for
  17. digital filtering
  18. dwell time
  19. artifact rejection
  20. digital averaging - Answer artifact rejection capacitors are electronic devices used to
  21. store electrical energy
  22. stop current flow when some critical power level is exceeded
  23. enhance current flow
  24. measure electrode impedance at the scalp - Answer store electrical energy Prestimulus triggering
  1. reduce the noise by 50%
  2. not change the ratio
  3. improve the ratio to 8:
  4. improve the ratio to 4:1 - Answer improve the ratio to 4: A condensation click
  5. delivers the loudest sounds to the tympanic membrane
  6. causes the tympanic membrane to move outward
  7. causes the headphone diaphragm to displace toward the tympanic membrane
  8. causes the headphone diaphragm to move away from the tympanic membrane - Answer causes the headphone diaphragm to displace toward the tympanic membrane the term "broadband click" refers to
  9. peak acoustic power of 2 - 4kHz
  10. short peak acoustic power of 1 - 2kHz
  11. broad peak acoustic power of 1 - 5kHz
  12. a peak acoustic power of 500 Hz to 2kHz - Answer peak acoustic power of 2 - 4kHz Reduction of the high frequency filter
  13. has no effect on EP latency
  14. has an unpredictable effect on EP latency
  15. increases EP latency
  16. decreases EP latency - Answer Increases EP latency The sensitivity setting on an amplifier set to produce a vertical deflection of 1 cm with an input of 10mV is
  17. 1mV/mm
  18. 1mV/cm
  19. 10mV/mm
  20. 20mV/cm - Answer 1mV/mm A rarefaction click occurs when the
  21. initial movement of a transducer diaphragm is towards the tympanic membrane
  22. initial movement of a transducer diaphragm is away from the tympanic membrane
  23. movement of a transducer diaphragm alternates in polarity relative to the tympanic membrane every second trial
  1. movement of a transducer diaphragm alternates in polarity relative to the tympanic membrane on a random basis - Answer initial movement of a transducer diaphragm is away from the tympanic membrane Facial nerve EMG responses are best recorded from
  2. masseter muscles
  3. orbicularis oris and orbicularis oculi muscles
  4. the facial nerve
  5. stylomastoid foramen - Answer orbicularis oris and obicularis oculi muscles Subdermal needle electrodes must be inserted symmetrically over the homologous brain areas to avoid
  6. excessive high impedance
  7. artificial amplitude asymmetries
  8. excessive bleeding
  9. common mode rejection of the EEG signal - Answer artificial amplitude asymmetries All of the following are true of magnetic stimulation except
  10. an electrical stimulator is required to pace the stimulus
  11. the stimulation is not perceived as painful
  12. pulses of current are delivered through a coil of wire
  13. magnetic field created causes movement in cortical neurons - Answer an electrical stimulator is required to pace the stimulus Well-maintained documentation is imperative throughout a surgical case in order to
  14. provide details of events associated with a functional loss
  15. require the technologist to focus on the operative procedure
  16. justify billing for monitoring service
  17. all of the above - Answer provide details of events associated with a functional loss It is required that the monitoring tech be able to communicate effectively with
  18. the surgical technologist
  19. surgical residents
  20. surgeon only
  21. anesthesiologist and surgeon - Answer anesthesia and surgeon With exposure provided by laminectomy, needle electrodes can record spinal activity with placement
  22. on the spinal cord
  23. in the epidural space

What problem may occur when performing intraoperative BAERs using compressible tubing and headphones

  1. patients post-op hearing can become impaired
  2. a contamination of the sterile field can occur
  3. the compressible tubing can become obstructed and obscure the sound to the ear
  4. their use may cause trauma to the ear canal and should be avoided - Answer Compressible tubing can become obstructed and obscure the sound to ear An "after-discharge" can occur on the cortical EEG recording following
  5. a seizure recorded in the OR
  6. electrical stimulation of the exposed cortex
  7. introduction of 60 Hz artifact
  8. electrocautery - Answer electrical stimulation of the exposed cortex For median nerve stim, the cathode is placed
  9. between the tendons of palmaris longus and flexor carpi radialis muscle
  10. on the dorsal side of wrist, approx 2 - 3cm from the ulnar nerve
  11. 4 - 5 cm distal to anode
  12. midway between the tendon and the posterior border of the medial malleolus - Answer between the tendons of palmaris longus and flexor carpi radialis muscle During MVD surgery to relieve a hemifacial spasm
  13. it is necessary to monitor EMG from CN III
  14. a stimulation of CN VIII elicits a response from the mentalis muscle
  15. the buccal branch of CN V will likely show the most EMG activity
  16. Cz-Fpz should be monitored for median nerve stimulation - Answer stim of CN VII elicits a response from the mentalis muscle To minimize pain from stimulation during the recording of SSEPs, the contact impedance of the stimulator should be
  17. less than 50 kohms
  18. more than 10,000 ohms
  19. less than 5,000 ohms
  20. less than 10 megohms - Answer less than 5,000 ohms The effects of Harrington rod distraction on the spinal cord can be tested by all of the following except
  21. the stagnara wake-up test
  22. SSEPs
  23. MEPs
  24. dorsal root stimulation - Answer dorsal root stimulation

It is important to begin monitoring EEG early during a carotid endarterectomy

  1. to prevent the anesthesiologist from removing your electrodes
  2. because emboli can break loose and cause changes, while prepping the neck
  3. to record as much b eta activity as possible before the patient is put under anesthesia
  4. to record the EEG before anesthesia and after induction for comparison during the case - Answer to record the EEG before anesthesia and after induction for comparison during the case Stimulation of the motor pathway can be achieved with little movement in the surgical field by
  5. decreasing muscle relaxants
  6. slowing the stimulation rate
  7. increasing the stimulation rate enough to produce muscle tetany
  8. increasing the stimulation duration - Answer Increasing the stimulation rate enough to produce muscle tetany While stimulating cranial nerve VII, a bipolar type stimulator has an advantage over a monopolar stimulator by
  9. requiring less current
  10. having greater specificity
  11. being less expensive
  12. presenting less rick of damage to the neural tissue - Answer having greater specificity When recording a posterior tibial nerve SSEP, the Fpz-C5s channel records
  13. subcortical far-field potentials
  14. subcortical near-field potentials
  15. stationary lumbar potentials
  16. erb's point potential - Answer subcortical far-field potentials When recording BAERs in the OR, some auditory stimulators utilize several inches of tubing to connect the transducer and ear inserts with
  17. do not affect the latencies of the waveforms
  18. are comparable to acoustically shielded headphones
  19. delay the signal to the transducer and can cause 60 Hz artifact
  20. delays the arrival of the sound to the ear and separates stimulus artifact - Answer delays the arrival of the sound to the ear and separates stimulus artifact a contraindication for the use of transcranial magnetic stimulation is
  21. patient obesity
  1. recording a full minute of EEG basline - Answer monitoring both hemispheres Preoperative baselines, SSEP values are essential to IONM because
  2. latencies and amplitudes are highly variable
  3. it is necessary to compare IONM values with laboratory normative data
  4. absolute boundaries for EPs obtained intra-op are not available
  5. they help to establish the appropriate level of anesthesia - Answer absolute boundaries for EPs obtained intra-op are not available A patient is admitted to the operating room diagnosed with a herniated C5/6 disc. Most appropriate nerve(s) to monitor during the resulting surgical procedure would be the
  6. tibial and ulnar nerves
  7. median and posterior tibial nerves
  8. median and auditory nerves
  9. ulnar nerve - Answer median and posterior tibial nerves The median nerve SSEP can be helpful as a measure of
  10. cerebral blood flow
  11. lower spinal cord function
  12. blood pressure variability
  13. anesthetic sensitivity - Answer Cerebral blood flow In the OR, the stim intensity for activating a sensory nerve
  14. should be set at double the sensory threshold
  15. should be set for two to three times the motor threshold
  16. does not have an established boundary
  17. is set to slightly above motor threshold - Answer does not have an established boundary The suggested rate of stimulation for intraoperative posterior tibial nerve evoked potential monitoring is:
  18. 30 to 40 per second
  19. 20 to 30 per second
  20. 10 to 20 per second
  21. 2 to 10 per second - Answer 2 to 10 per second When stimulating the posterior tibial at the ankle, stimulation can be confirmed by
  22. turning the stimulator up to read 20mA
  23. recording a cortical response at Cp
  24. reducing the impedance of the stimulating electrodes to less than 5k ohms
  1. recording a response from the popliteal fossa - Answer Recording a response from the popliteal fossa To record cortical SSEPs during intraoperative monitoring of cervical spinal cord surgery, electrodes should be placed
  2. 2cm anterior to C3 and C
  3. 2cm posterior to C3 and C
  4. in the C3 and C4 positions of the 10 - 20 system
  5. between Cz and Pz and between Pz and Oz - Answer 2 cm posterior to C3 and C "Hearing level" (HL) is defined as the
  6. average threshold intensity of normally hearing young adults
  7. intensity of along duration sound that has the same amplitude as the peak SPL of a short duration sound
  8. lowest intensity that an average ear drum can her
  9. inverse of the sound pressure level - Answer average threshold intensity of normally hearing young adults In order to record cortical SSEPs during intraoperative monitoring of the thoracolumbar spinal cord (BLE SSEP), an electrode should be placed
  10. 2cm posterior to Pz
  11. 2cm anterior to Cz
  12. 2cm posterior to Cz
  13. 2cm posterior to C3 and C4 - Answer 2 cm posterior to Cz The recommended location for recording the cervical cord response to median nerve stimulation
  14. C
  15. C
  16. C
  17. C8 - Answer C A secure method for applying surface cup electrodes requires
  18. application the day before surgery
  19. a conductive paste and tape
  20. water resistant tape
  21. collodion and compressed air - Answer collodion and compressed air The amplitude of the cortical response to posterior tibial SSEP stim is at least 80% attenuated by
  22. stimulation rates of 15 per second or higher

During OR EP monitoring, it is recommended that the techs data sheet should include all of the following except

  1. operative events and communications with the surgeon
  2. instruments passed to the surgeon and the number of sponges used
  3. patient vital signs and anesthetic agents
  4. recorded artifacts and measures to eliminate them - Answer instruments passed to the surgeon and the number of sponges used When monitoring SSEPs, dural or direct cord recordings are advantageous because
  5. they present less discomfort to the patient than scalp leads
  6. they have less chance of artifact during cauterization
  7. the waveforms better reflect cortical responses
  8. the waveforms are higher in amplitude and require fewer responses - Answer the waveforms are higher in amplitude and require fewer responses The effects of pharmacological or surgical manipulations can be mimicked by the inappropriate manipulation of
  9. the stimulus rate
  10. the stimulus intensity
  11. filter settings
  12. the ground electrode - Answer filter settings Direct focal electrical stimulation of a peripheral nerve lesion will
  13. define epileptiform activity generated in the lesion
  14. identify benign masses versus malignant tumor masses
  15. be of no value
  16. more precisely localize the distribution of intact conducting nerve fibers - Answer more precisely localize the distribution of intact conducting nerve fibers For stimulation in MEP studies, the anode should be placed
  17. rostral to the cathode
  18. caudal to the cathode
  19. medial to the cathode
  20. lateral to the cathode - Answer rostral to the cathode Spectral analysis of raw EEG data displays power as an upward deflection and
  21. wave morphology in a compromised design
  22. frequency as a linear display across the epoch line
  23. time horizontally on the graph
  24. time as spectral edge - Answer frequency as a linear display across the epoch line

When monitoring SSEPs during a critical moment in the OR, changing the setting of the high-frequency filter

  1. will be of limited consequences to the outcome of the study
  2. may help isolate a true signal from background noise
  3. may increase the number of single trial events required to resolve the evoked response
  4. may lead to false interpretation of the data - Answer May lead to a false interpretation of the data A stimulus pulse width that would tend to excite a larger population of motor fibers then sensory fibers is
  5. 0.05ms
  6. 0.2ms
  7. 0.5ms
  8. 1ms - Answer 0.05 ms Stimulation of the spinal cord to elicit MEPs is most useful for monitoring
  9. anterior spinal cord function
  10. dorsal column function
  11. peripheral nerve function
  12. ascending spinal cord tracts - Answer anterior spinal cord function When monitoring the facial nerve
  13. long-lasting muscle relaxants must be avoided
  14. bipolar electrodes should be placed in the larynx
  15. needle electrodes should be placed in the masseter
  16. inhalational anesthetic agents must be avoided - Answer long-lasting muscle relaxants must be avoided To optimally monitor CN VIII function in the OR, it is desirable to be able to simultaneously perform
  17. BAERs and electrocochleograms (ECochG)
  18. median SSEPs and CMAPS
  19. BAERs and SSEPs
  20. BAERs and EEG - Answer BAERs and electrocochleograms (ECochG) Vascular malformations of the posterior fossa associated w/hemifacial spasm and facial paresis may cause
  21. a loss of wave I on the BAER
  22. BAER latency abnormalities
  23. increased amplitudes if tubal inserts are used for stimulation