title: Monotic versus dichotic multiple-stimulus auditory steady state responses in young children.
abstract: In their recent study on infant multiple auditory steady state responses (ASSR), the authors found that ASSR amplitudes unexpectedly decreased when switching from 1-ear stimulation to 2-ear stimulation, a result not present in adults. In addition, residual EEG noise levels increased in the 2-ear condition. In the present study, to determine whether to use 1-ear or 2-ear multiple ASSR Protocols clinically, the authors tested a new group of 19 young children to determine whether these unexpected findings could be replicated. ASSR amplitude and EEG noise were compared for 1-ear (4 stimuli) versus 2-ear (8 stimuli) multiple stimuli presented at 60 dBHL. Results indicated a small but significant decrease in amplitudes going from 1-ear (40.1 nV) to 2-ear (37.9 nV) multiple stimuli. EEG noise was not significantly different between the 2 conditions. Despite small amplitude decreases, the 2-ear stimulus condition was more efficient for infants and young children with normal hearing.
authors.affiliation: School of Audiology & Speech Sciences, The University of British Columbia, Vancouver, British Columbia, Canada.
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Hatton
authors.forename: David R
authors.initials: DR
authors.lastname: Stapells
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold / Q000502:physiology; D002675:Child, Preschool; D004007:Dichotic Listening Tests / Q000379:methods* / Q000592:standards*; D004569:Electroencephalography / Q000379:methods / Q000592:standards; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology*; D005260:Female; D006309:Hearing / Q000502:physiology*; D006801:Humans; D007223:Infant; D008297:Male; D015203:Reproducibility of Results; D013017:Sound Localization / Q000502:physiology*