That part of the brainstem which is continuous with the spinal cord and contains the
decussation of the pyramids, is the
medulla oblongata
Dwell time may be defined as
the intersample interval
Concerning the ABR traces above, which of the following is most likely to be true?
The data are consistent with a retrocochlear lesion
A ground loop is created when
two separate devices are all connected to one patient and have two separate grounding
connections
The biomed safety analyzer is used for the following:
Chassis leakage of equipment measurement
3 multiple choice options
Neurapraxia is
conduction of nerve impulse is blocked with no axonal damage
Both SEP and ABR should be involved in the monitoring of aneurysms involving the
posterior fossa
An agent to be avoided prior to electrocorticography for interictal discharges is
phenytoin
,Facial nerve EMG response to intracranial stimulation latency is around:
7 msec
Median Nerve
MCA
TCMEP monitoring in scoliosis surgery may obviate a need for the
the Stagnara wake up test
To resect a vestibular schwannoma, which of the following surgical approaches
typically sacrifices hearing?
translabyrinthine
Transcranial Magnetic Evoked Potentials are preferred to Transcranial Electric motor
evoked potentials for intraoperative monitoring because:
They are not favored for intraoperative monitoring
Electrode lead wires used in the operating room suite must be adapted to safety
connectors (female electrodes) by
May, 2000
During a posterior fossa approach for resection of an acoustic neuroma, an increase in
latency of Wave V is most likely due to
cerebellum retraction
The following statement is incorrect
boiling water is adequate to sterilize surgical instruments
To prevent ground loops, the patient should
,Never be grounded to a point of more than one location
All the following are benefits of EEG monitoring in carotid endarterectomy except
heparin dosing monitoring
The following is transmitting SEPs in the upper extremity through the
cuneate nucleus
To accurately reflect the amplitude of an EP waveform a match must be achieved
between the
signal size and the vertical capacity of the digitizer
All of the following are opioids except
Propofol
An inaccurate depiction of an analog wave by A to D conversion reflecting a lower
frequency because of a low sampling rate is referred to as
aliasing
Diazepam (Valium), lorazepam (Ativan), and clonazepam (Clonopin) are
benzodiazepines
3
Transcranial magnetic and electrical motor evoked potentials
are primarily limited to the lateral corticospinal tracts
3
Subdermal needle electrodes, due to their significantly smaller surface area, will have
an impedance
larger than skin surface electrodes
, 3
Preoperative baseline, sensory evoked potential values are critical to intraoperative
neurophysiological monitoring because
absolute limits for EPs recorded intraoperatively do not exist
3
Crossover sound stimulation conducted by the skull during BAEP stimulation, can be
avoided by
applying contralateral masking noise
Which stimulating montage should produce right thenar TCMEPs?
C3+ C4-
A unit of resistance is symbolized by
Ω
Fast Fourier transformation
is the mathematical transformation of a complex waveform into simpler, more uniform
waves
Hearing level (HL) is defined as the
mean threshold intensity for young adults with normal hearing
The typical stimulus intensity to elicit TCMEPs is
100-1000 volts
If not otherwise specified, most reports of ABR are presented
vertex positive up