ACNS Guidelines Auditory Evoked Potentials

ACNS Guidelines Auditory Evoked Potentials 5 to 200/s - ANSWER 5 to 200/sStimulus rates employed vary widely from Short-latency auditory evoked potentials (SAEPs) - ANSWER electrical responses of the auditory pathways that occur within 10—15 ms of an appropriate acoustic stimulus in normal subjects. The electrocochleogram (ECochG) - ANSWER consists of electrical responses of the cochlea and the auditory nerve to acoustic stimulation. (ECochG) includes - ANSWER e (1) the cochlear microphonics; (2) the summating potential; and (3) the auditory nerve compound action potential (AP). The cochlear microphonics (CM) and the summating potential (SP) are - ANSWER receptor potentials of cochlear hair cells. auditory nerve compound AP - ANSWER the whole-nerve AP generated by primary auditory nerve fibers. BAEPs are responses of - ANSWER auditory nerve, brainstem, and, perhaps, higher subcortical structures to acoustic stimulation. N1 - ANSWER the main ear canal-negative component of the auditory nerve compound AP N2 - ANSWER the subsequent negative wave "broad-band" clicks - ANSWER the acoustic energy of which is spread over a wide range of audio frequencies Clicks should be generated by driving with a - ANSWER 100 usec rectangular pulse (single monophasic square wave) rarefaction - ANSWER negative pressure in front of the earspeaker diaphragm condensation - ANSWER positive pressure in front of the earspeaker diaphragm 10/s - ANSWER Waves I,II, VI, and VII are particularly reduced in amplitude at rates higher than 8—10/s - ANSWER Stimulus rate for BAEPs