Electrophysiologic assessment of low-frequency hearing: sedation effects.
Sixteen normal-hearing adults were tested in both awake and sedated states for several evoked responses to low-frequency stimuli. Responses obtained by cross-correlation function, middle latency responses, and the 40-Hz response proved most sensitive; all had mean thresholds of less than 20 dB normal hearing level for the awake-alert state, but 40-Hz and middle latency response mean thresholds were shifted about 10 dB under sedation. The cross-correlation method seems to offer promise for pediatric auditory assessment.
Palaskas
C W
CW
Department of Otolaryngology-Head and Neck Surgery, University of Washington, Seattle 98195.
Wilson
M J
MJ
Dobie
R A
RA
D000328:Adult; D001300:Audiometry, Evoked Response / Q000379:methods; D001303:Auditory Cortex / Q000187:drug effects / Q000502:physiology; D001306:Auditory Pathways / Q000187:drug effects / Q000502:physiology; D001309:Auditory Threshold / Q000187:drug effects* / Q000502:physiology; D001933:Brain Stem / Q000187:drug effects / Q000502:physiology; D002697:Chloral Hydrate / Q000494:pharmacology*; D005072:Evoked Potentials, Auditory / Q000187:drug effects* / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D010898:Pitch Perception / Q000187:drug effects* / Q000502:physiology; D011930:Reaction Time / Q000187:drug effects
D002697:Chloral Hydrate