Tulloch

A 10Hz signal passing through a 10Hz locut filter will be: A) Reduced in frequency to approximately 7hz B) Affected in no way C) Reduced in amplitude by approximately 30% D) Eliminated - C) Reduced in amplitude by approximately 30% A 60Hz notch filter should not be used for evoked potential recording because of: A) The ringing artifact that comes from distortion of the stimulus artifact B) Aliasing of the signal by the filter C) 60Hz interference coming from various OR equipment D) Comm...

A patient with a history of diabetes is likely to also have: - Peripheral Radiculopathy, increased upper, lower SSEPs A positive event occurring in the lead connected to the negative terminal, will result in a deflection - Downward A selective dorsal rhizotomy is associated with: - Cerebral palsy and the severing of posterior rootlets A small unilateral increase in latency at N10 peak during surgery may be attributed to: - A decrease in body temperature A stroke associated with a carotid...

"Pre stimulus triggering? - Includes a period of recording before the stimulus A "beanbag" is often used: - In the lateral position A 60 Hz artifact will most likely be caused by: - Microscope A CMAP response to proximal facial nerve stimulation following tumor removal would indicate? - An intact neuromuscular pathway A condensation click - Causes the headphone diaphragm to displace toward the tympanic membrane A constant voltage stimulator - Varies the current in order to maintain a p...

Age Specific Normative data for BAEP is necessary under what age? - 3 years of age Constant current in SSEP Stimulation defines the ability of the stimulator to increase the intensity when which other factor is changed? - Impedance at the stimulator site Define recommended number of trials to be averaged for BAEP - 1,000-4,000 trials Define recommended pulse width for SEP stimulation - 100-300 usec or .1-.3 seconds Define recommended system set up changes which are recommended for FF- PR-VE...

A 10-bit A/D converter has how many discrete voltage values in its range? - 1024 A 10Hz signal passing through a 10 Hz locut filter will be - Reduced in amplitude by approximately 30% A 60Hz artifact would most likely be caused by: - Infusion Pump A 60Hz notch filter should not be used for evoked potential recording because of: - The ringing artifact that comes from distortion of the stimulus artifact A decrease in the power spectral edge indicates.. - a greater proportion of EEG power at ...

If you have attenuation of wave V of BAERs that persists until closing, what is the most likely cause? - Retraction of the cerebellum What is the most important setting when establishing baseline BAER data? - Side of ear stimulation When opening posterior fossa, what is the most likely cause for the attenuation of wave I of BAERs? - Drilling cranium When opening posterior fossa, what is the most likely cause for the attenuation of wave I of BAERs? - Drilling cranium A lab calibrated their...

A global significant decrease in amplitude of cortical SSEPs w/o significant decrease in amplitude of cervical and subcortical responses in a lumbar spine surgery is most possibly due to: a) Inadequate stimulation b) Changes in anesthesia regimen c) Significant blood loss due to surgery d) Damages caused by the surgery - B A loss of SSEP response would most likely occur _____ to the surgical site a) Rostral b) Caudal c) Anterior d) Posterior - B After-discharges occur after what? a) ...

A 60 Hz artifact will most likely be caused by... - Microscope A decreasing body temperature of the surgical patient monitored with EPs can result in... - Increasing latencies of SSEPs and BAERs. A delay in the latency of one eye in a PREP is diagnostic of... - Compressive lesion Optic Neuritis Ischemic Optic Atrophy A patient is admitted to the operating room diagnosed with a burst fracture of the first lumbar vertebra. The most appropriate nerve(s) to monitor would be the: - PTN and UN ...

_______________________________ is the single most important step taken to avoid contamination 1. using gloves 2. using protective eyewear 3. washing hands 4. using transportation barrier - Washing hands "Hearing level" (HL) is defined as the 1. average threshold intensity of normally hearing young adults 2. intensity of along duration sound that has the same amplitude as the peak SPL of a short duration sound 3. lowest intensity that an average ear drum can her 4. inverse of the sou...

Your initial signal amplitude is 0.5 μV inside a background noise of 2 μV, what will the signal to noise ratio be after 400 averages? - 5 You would expect a loss of BAEPs in which surgery? - Pontine glioma You want your vertical resolution to: - Match the amplitude of your input to maximize the signal You want to have matching impedances so that: - You can maximize your common mode rejection You record a spinal potential to: - Establish an AP Why is platinum used in epidural recordings -...