What is an abr Study guides, Class notes & Summaries

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During a median nerve preoperative study, a patient has discomfort at the wrist. Stimulation electrodes are 10 mm gold disk, stimulus intensity is 20 mA, and stimulus duration is 100 μsec. Which of the following would most likely reduce the patient's discomfort while maintaining adequate stimulation? - Decrease number of repetitions What is not an advantage of epidural recordings? - Absence of significant artifact The stimulation rate is determined by the - analysis time Somatosensory e...

Define ABR Correct Answer - Auditory Brainstem Response - Measures neural response of the auditory pathway. - Synchronous activity of the auditory nerve and brainstem in response to an acoustic stimulus. Generator Sites of the ABR Correct Answer I - Distal CN VIII II - Proximal CN VIII III - Cochlear Nucleus IV - SOC V - Lateral Lemniscus 3 Factors that affect ABR Correct Answer - Noise - ME Disorders - Age/Gender Is ABR a test of hearing? Correct Answer - No, it's a test of th...

CNIM Practice Exam 1 During a median nerve preoperative study, a patient has discomfort at the wrist. Stimulation electrodes are 10 mm gold disk, stimulus intensity is 20 mA, and stimulus duration is 100 μsec. Which of the following would most likely reduce the patient's discomfort while maintaining adequate stimulation? - Decrease number of repetitions What is not an advantage of epidural recordings? - Absence of significant artifact The stimulation rate is determined by the - ana...

CNIM Practice Exam 1 Which of the following is least likely to cause electrical interference in the operating room? - The pneumatic drill If the monitoring instrument develops an inability to average, steps to take would include all the following except:? - Consult with the anesthesiologist anesthesia changes Lying between the adjacent surfaces of the vertebral bodies and bonding them together, are the: ? - Intervertebral discs The dorsal column pathways synapse at which loci on t...

Hair cells Cochlear microphonics are used to monitor what? Increase in delta power and increase in alpha-beta power What is the effect on EEG from induction using isoflurane? A. Decreased delta followed by increased alpha/beta B. Increase in delta power and increase in alpha-beta power C. Increase in low-voltage fast activity D. Increased power at all frequencies Brainpower Read More limb length What determines the latency of SSEPs most? Lowering the impedances of...

What is AEP Correct Answer and auditory evoked potential What does ABR measure Correct Answer the series of "neuroelectric events" that represent sound traveling to the brain There is an immediate electrical response in the cochlea when Correct Answer a sound is introduced to the ear As the signal is propagated along the auditory pathway, it encounters Correct Answer a number of "relay stations" Time elapses as the signal Correct Answer travels between these relay stations on its...

Cnim 1000 practice questions Fixed During a scoliosis surgery, you recognize a gradual latency increase of 3.5 msec in the PTN cortical response, the subcortical response appears to be shifted out almost as much. All response amplitudes are unchanged. What is the appropriate action to take? a. Ignore the change, it means nothing. b. Inform the surgeon immediately that changes consistent with spinal cord injury may have occurred. Recommend a wake up test. c. Check the latencies of the PF an...

what is AEP - ️️and auditory evoked potential what does ABR measure - ️️the series of "neuroelectric events" that represent sound traveling to the brain there is an immediate electrical response in the cochlea when - ️️a sound is introduced to the ear as the signal is propagated along the auditory pathway, it encounters - ️️a number of "relay stations" time elapses as the signal - ️️travels between these relay stations on its way to the auditory cortex when...

Hair cells Cochlear microphonics are used to monitor what? Increase in delta power and increase in alpha-beta power What is the effect on EEG from induction using isoflurane? A. Decreased delta followed by increased alpha/beta B. Increase in delta power and increase in alpha-beta power C. Increase in low-voltage fast activity D. Increased power at all frequencies limb length What determines the latency of SSEPs most? Lowering the impedances of ground and stimulating e...