ASET CNIM EVALUATION TEST ANSWERS AND
QUESTIONS SET A+
✔✔capacitors are electronic devices used to
1. store electrical energy
2. stop current flow when some critical power level is exceeded
3. enhance current flow
4. measure electrode impedance at the scalp - ✔✔store electrical energy
✔✔Prestimulus triggering
1. presents a positive signal to the averager prior to initiating the display
2. includes a period of recording before the stimulus
3. eliminates the problems associated with recording the stimulus artifact
4. delays the synchronizing pulse to the computer - ✔✔includes a period of recording
before the stimulus
✔✔The horizontal resolution of an evoked potential system
1. should be 20 microseconds per data point or less
2. has no effect on the aliasing properties of the instrument
3. should be greater than 30 milliseconds per data point
4. is one half the Nyquist frequency - ✔✔should be 20 microseconds per data point or
less
✔✔ - ✔✔A unit of resistance is symbolized by
✔✔Given an electrical circuit with a resistance of 1000 ohms and voltage of 10 volts,
the current flow will be
1. 0.1 A
2. .10 ohms
3. 10 A
,4. 100 volts - ✔✔.01 A
✔✔The common mode rejection ratio of amplifiers used for EP recording should be at
least
1. 100:1
2. 1,000:1
3. 10,000:1
4. 100,000:1 - ✔✔10,000:1
✔✔Spectral edge is a function of
1. beta and alpha vs time
2. amplitude and latency vs time
3. power and frequency vs time
4. zero crossing intervals - ✔✔power and frequency vs time
✔✔With a sampling rate of 10kHz the shortest sine wave resolved would be
1. 2msec
2. .2msec
3. .4msec
4. .02msec - ✔✔.2msec
✔✔If you have a signal to noise ratio of 1:2, averaging 64 responses will
1. reduce the noise by 50%
2. not change the ratio
3. improve the ratio to 8:1
4. improve the ratio to 4:1 - ✔✔improve the ratio to 4:1
✔✔A condensation click
1. delivers the loudest sounds to the tympanic membrane
2. causes the tympanic membrane to move outward
3. causes the headphone diaphragm to displace toward the tympanic membrane
4. causes the headphone diaphragm to move away from the tympanic membrane -
✔✔causes the headphone diaphragm to displace toward the tympanic membrane
✔✔the term "broadband click" refers to
1. peak acoustic power of 2-4kHz
2. short peak acoustic power of 1-2kHz
3. broad peak acoustic power of 1-5kHz
,4. a peak acoustic power of 500 Hz to 2kHz - ✔✔peak acoustic power of 2-4kHz
✔✔Reduction of the high frequency filter
1. has no effect on EP latency
2. has an unpredictable effect on EP latency
3. increases EP latency
4. decreases EP latency - ✔✔Increases EP latency
✔✔The sensitivity setting on an amplifier set to produce a vertical deflection of 1 cm
with an input of 10mV is
1. 1mV/mm
2. 1mV/cm
3. 10mV/mm
4. 20mV/cm - ✔✔1mV/mm
✔✔A rarefaction click occurs when the
1. initial movement of a transducer diaphragm is towards the tympanic membrane
2. initial movement of a transducer diaphragm is away from the tympanic membrane
3. movement of a transducer diaphragm alternates in polarity relative to the tympanic
membrane every second trial
4. movement of a transducer diaphragm alternates in polarity relative to the tympanic
membrane on a random basis - ✔✔initial movement of a transducer diaphragm is away
from the tympanic membrane
✔✔Facial nerve EMG responses are best recorded from
1. masseter muscles
2. orbicularis oris and orbicularis oculi muscles
3. the facial nerve
4. stylomastoid foramen - ✔✔orbicularis oris and obicularis oculi muscles
✔✔Subdermal needle electrodes must be inserted symmetrically over the homologous
brain areas to avoid
1. excessive high impedance
2. artificial amplitude asymmetries
3. excessive bleeding
4. common mode rejection of the EEG signal - ✔✔artificial amplitude asymmetries
, ✔✔All of the following are true of magnetic stimulation except
1. an electrical stimulator is required to pace the stimulus
2. the stimulation is not perceived as painful
3. pulses of current are delivered through a coil of wire
4. magnetic field created causes movement in cortical neurons - ✔✔an electrical
stimulator is required to pace the stimulus
✔✔Well-maintained documentation is imperative throughout a surgical case in order to
1. provide details of events associated with a functional loss
2. require the technologist to focus on the operative procedure
3. justify billing for monitoring service
4. all of the above - ✔✔provide details of events associated with a functional loss
✔✔It is required that the monitoring tech be able to communicate effectively with
1. the surgical technologist
2. surgical residents
3. surgeon only
4. anesthesiologist and surgeon - ✔✔anesthesia and surgeon
✔✔With exposure provided by laminectomy, needle electrodes can record spinal
activity with placement
1. on the spinal cord
2. in the epidural space
3. in the pedicle
4. in the spinal muscle - ✔✔in the epidural space
✔✔To record the compound action potential of the median nerve intraoperatively, the
electrode should be placed at
1 antecubital fossa
2. the wrist
3. C2
4. the shoulder - ✔✔antecubital fossa
✔✔An advantage to using grid or strip electrodes over the "crown of thorns" for
recording the ECoG is the ability to
1. place electrodes precisely on gyri
2. sterilize and reuse them
3. individually position each contact
QUESTIONS SET A+
✔✔capacitors are electronic devices used to
1. store electrical energy
2. stop current flow when some critical power level is exceeded
3. enhance current flow
4. measure electrode impedance at the scalp - ✔✔store electrical energy
✔✔Prestimulus triggering
1. presents a positive signal to the averager prior to initiating the display
2. includes a period of recording before the stimulus
3. eliminates the problems associated with recording the stimulus artifact
4. delays the synchronizing pulse to the computer - ✔✔includes a period of recording
before the stimulus
✔✔The horizontal resolution of an evoked potential system
1. should be 20 microseconds per data point or less
2. has no effect on the aliasing properties of the instrument
3. should be greater than 30 milliseconds per data point
4. is one half the Nyquist frequency - ✔✔should be 20 microseconds per data point or
less
✔✔ - ✔✔A unit of resistance is symbolized by
✔✔Given an electrical circuit with a resistance of 1000 ohms and voltage of 10 volts,
the current flow will be
1. 0.1 A
2. .10 ohms
3. 10 A
,4. 100 volts - ✔✔.01 A
✔✔The common mode rejection ratio of amplifiers used for EP recording should be at
least
1. 100:1
2. 1,000:1
3. 10,000:1
4. 100,000:1 - ✔✔10,000:1
✔✔Spectral edge is a function of
1. beta and alpha vs time
2. amplitude and latency vs time
3. power and frequency vs time
4. zero crossing intervals - ✔✔power and frequency vs time
✔✔With a sampling rate of 10kHz the shortest sine wave resolved would be
1. 2msec
2. .2msec
3. .4msec
4. .02msec - ✔✔.2msec
✔✔If you have a signal to noise ratio of 1:2, averaging 64 responses will
1. reduce the noise by 50%
2. not change the ratio
3. improve the ratio to 8:1
4. improve the ratio to 4:1 - ✔✔improve the ratio to 4:1
✔✔A condensation click
1. delivers the loudest sounds to the tympanic membrane
2. causes the tympanic membrane to move outward
3. causes the headphone diaphragm to displace toward the tympanic membrane
4. causes the headphone diaphragm to move away from the tympanic membrane -
✔✔causes the headphone diaphragm to displace toward the tympanic membrane
✔✔the term "broadband click" refers to
1. peak acoustic power of 2-4kHz
2. short peak acoustic power of 1-2kHz
3. broad peak acoustic power of 1-5kHz
,4. a peak acoustic power of 500 Hz to 2kHz - ✔✔peak acoustic power of 2-4kHz
✔✔Reduction of the high frequency filter
1. has no effect on EP latency
2. has an unpredictable effect on EP latency
3. increases EP latency
4. decreases EP latency - ✔✔Increases EP latency
✔✔The sensitivity setting on an amplifier set to produce a vertical deflection of 1 cm
with an input of 10mV is
1. 1mV/mm
2. 1mV/cm
3. 10mV/mm
4. 20mV/cm - ✔✔1mV/mm
✔✔A rarefaction click occurs when the
1. initial movement of a transducer diaphragm is towards the tympanic membrane
2. initial movement of a transducer diaphragm is away from the tympanic membrane
3. movement of a transducer diaphragm alternates in polarity relative to the tympanic
membrane every second trial
4. movement of a transducer diaphragm alternates in polarity relative to the tympanic
membrane on a random basis - ✔✔initial movement of a transducer diaphragm is away
from the tympanic membrane
✔✔Facial nerve EMG responses are best recorded from
1. masseter muscles
2. orbicularis oris and orbicularis oculi muscles
3. the facial nerve
4. stylomastoid foramen - ✔✔orbicularis oris and obicularis oculi muscles
✔✔Subdermal needle electrodes must be inserted symmetrically over the homologous
brain areas to avoid
1. excessive high impedance
2. artificial amplitude asymmetries
3. excessive bleeding
4. common mode rejection of the EEG signal - ✔✔artificial amplitude asymmetries
, ✔✔All of the following are true of magnetic stimulation except
1. an electrical stimulator is required to pace the stimulus
2. the stimulation is not perceived as painful
3. pulses of current are delivered through a coil of wire
4. magnetic field created causes movement in cortical neurons - ✔✔an electrical
stimulator is required to pace the stimulus
✔✔Well-maintained documentation is imperative throughout a surgical case in order to
1. provide details of events associated with a functional loss
2. require the technologist to focus on the operative procedure
3. justify billing for monitoring service
4. all of the above - ✔✔provide details of events associated with a functional loss
✔✔It is required that the monitoring tech be able to communicate effectively with
1. the surgical technologist
2. surgical residents
3. surgeon only
4. anesthesiologist and surgeon - ✔✔anesthesia and surgeon
✔✔With exposure provided by laminectomy, needle electrodes can record spinal
activity with placement
1. on the spinal cord
2. in the epidural space
3. in the pedicle
4. in the spinal muscle - ✔✔in the epidural space
✔✔To record the compound action potential of the median nerve intraoperatively, the
electrode should be placed at
1 antecubital fossa
2. the wrist
3. C2
4. the shoulder - ✔✔antecubital fossa
✔✔An advantage to using grid or strip electrodes over the "crown of thorns" for
recording the ECoG is the ability to
1. place electrodes precisely on gyri
2. sterilize and reuse them
3. individually position each contact
