ABRET Practice Test 3 Questions With Correct Answers

lateral geniculate - Answer Which of the following is involved in the visual system? .5v - Answer Using an amplification factor of 500,000, a 1uV brainstem auditory evoked potential waveform will be amplified to 100HZ - Answer If the sampling rate is 5 msec, the highest frequency that can be resolved is: Cpz - Answer Where would you record P37? V - Answer Which cranial nerve destination is Muscles of mastication, with functions of chewing and sensations for touch, pain, and temperature? sensory cortex - Answer N2O GENERATOR spinal nerve root - Answer N11 GENERATOR peroneal - Answer The nerve responsible for foot drop N9, N11, N13 - Answer Cv-5 anterior neck derivation for upper extremity SSEP registers: hearing loss, headaches, unsteady gait - Answer The patient presenting prior to surgery for removal of an acoustic neuroma would likely have symptoms including increased I-III, increased I-V interpeak - Answer In BAEP's Neurofibromatosis type II causes: optic nerves - Answer The fibers anterior to the chiasm in the visual pathway are called: brainstem at the level of the medulla - Answer Where do the posterior columns terminate? low frequency sensorineural hearing loss - Answer A type of hearing loss which may not change the ABR is: maximal response - Answer What is an advantage of synchronous stimulation selective dorsal root rhizotomy - Answer Which procedure may be done to reduce muscle spasticity? opening of the dura - Answer What is the most common reason for loss of BAEPs during retromastoid microvascular decompression? V1, V2, V3 - Answer Cranial nerve V branches are classified as: Syringomyelia (Syrinx) - Answer deterioration of the spinal cord gray matter which is replaced with a large cyst 7msec - Answer Average latency of CMAP after stimulation of the facial nerve? Paresthesia - Answer tingling it is easy to differentiate between left and right side responses - Answer When performing asynchronous stimulation for intraoperative SSEPs: perform an additional trial - Answer If the trials are not reproducible Wave III, Wave V, P14, P18, P31, N34 - Answer Name the six far field potentials increased absolute latency, normal interpeak latencies - Answer In BAEP, otosclerosis in middle ear causes: lesion occurs in a structure not involved in the pathway being monitored - Answer Which of the following is a reason why a false-negative could occur? increased absolute latency, normal inter peak latencies - Answer In BAEP's blood, betadine or irrigation fluid in tubing causes: optic nerves - Answer In the visual pathway, fibers anterior to the chiasm are called: attending to the rare stimuli - Answer The P300 potential using the odd-ball paradigm is elicited by: 5.5msec - Answer Wave V is usually the most prominent peak after charcot-marie tooth disease - Answer Which of the following will result in significantly elevated SSEP latencies? neuroforamen - Answer opening within the spinal canal for nerve roots to enter the spinal cord D wave is ogliosynaptic and I wve is polysynaptic potential; Both D and I waves are recorded from the spinal cord via epidural electrode; d wave latency becomes shorter with increased stim intensity - Answer In regard to spinal potentials recorded after transcranial electrical stimulation, all of the following are true patient age - Answer Pattern reversal visual evoked potential latencies are most significantly affected by 0.9msec - Answer Insert earphone delay is 256 - Answer How many averages would be required to increase a 1uV signal in a 4uV background to a signal to noise ratio of 4:1? abnormal muscle response - Answer Hemifacial spasm superior temporal gyrus - Answer Where is the primary auditory receptive area of the cortex? frontal electrode - Answer N100 of a VEP is recorded at the: P300 - Answer Which of the following waveforms is elicited by a subject attending to rare stimuli schwann cells - Answer nodes of ranvier is the space between loss of vasular perfusion can lead to MEP changes during resection; dissection through dorsal columns can lead to decrease in SSEPS; tumor resection can lead to MEP change due to axonal damage - Answer What is true about intramedullary spinal tumor resection V, VI, and VII - Answer CN that originate at the pons 1 amp - Answer If a 4 ohm resistor and a 2 ohm resistor are wired in series across a 6 volt battery, what is the curernt across each resistor? peripheral nerve legion - Answer What does an increased N9 latency with equally increase N13 and N20 and decrease peripheral nerve conduction velocity with normal conduction times indicate? lateral geniculate body - Answer Where do the optic tracts terminate and relay the visual impulses to the visual cortex? brainstem - Answer A Cv5-FPZ response is generated from the: rarefaction and condensation clicks - Answer What stimulus should be used for ECochG? N13, N20, P37 - Answer Which of the following are stationary potentials? normal or near normal at high intensity click stimulation but lower intensity stim, increased absolute latencies and normal interpeak latencies - Answer In BAEP's, high frequency hearing loss causes brainstem - Answer posterior fossa is located Cz-contra ear - Answer What is the best montage for distinguishing a IV/V complex? greater than 200 volt - Answer The voltage of transcranial electric stimulation that is required to elicit motor response (MEP) is generally acoustic - Answer use of pneumatic drill will create what type of noise artifact in Baep responses thalamus - Answer Delta waves are probably generated in the: decreases amp increases latency - Answer Increasing the stimulus rate of BAEP luminance, contrast, stim rate - Answer Increasing the stimulus rate of BAEP Anterior inferior cerebral artery ischemia - Answer If you suddenly lose all ipsilateral BAEP responses, what might be the cause The generator of N13 - Answer stationary (non propagated) cervical potential recorded referentially from the dorsal neck probably reflecting main post synaptic activity in the cervical cord C3 and Cz - Answer With referential recording, maximal amplitude cortical evoked potentials following stimulation of the left posterior tibial nerve usually would be found between enhances wave I - Answer rarefaction dorsal and ventral rami - Answer nerves of the body (median, ulnar, femoral) are formed from the rarefaction - Answer In ABR stimulation, the stimulus type which causes a negative pressure resulting in a slightly earlier latency is radial nerve - Answer Wrist drop is caused by an injury to the: EcochG - Answer The cochlea generates what EP response 150 to 2500 Hz - Answer The filter settings for recording intraoperative BAEP should be increased III-V, Increased I-V - Answer In BAEP's cerebellar retraction causes optic nerve dysfunction - Answer which of the following conditions is the P100 of the pattern reversal visual evoked potential prolonged? prolonged wave I-III IPL - Answer The most sensitive BAEP abnormality caused by acoustic neuroma is partial field stim - Answer A W-shaped pattern reversal visual evoked potential may be resolved with