Rate and filter dependence of the middle-latency response in infants.
Auditory evoked-potential activity in the 0 to 100-ms latency range was explored using wide-band filtering and a range of stimulus rates, in 8 babies ranging in age from 2 to 6 months. We observed both a stable early positive peak, in the 10 to 15-ms region, and a rate-dependent, positive peak at about 50 ms in all 8 babies. The latter response was best observed at rates of 1-2.5 stimuli/s and seldom observed at rates above 4/s. This peak may represent a developmentally early version of the Pa peak of the adult middle-latency response.
Jerger
J
J
Department of Otolaryngology, Baylor College of Medicine, Houston, Tex.
Chmiel
R
R
Glaze
D
D
Frost
J D
JD
D001307:Auditory Perception / Q000502:physiology*; D001933:Brain Stem / Q000502:physiology*; D002657:Child Development; D004292:Dominance, Cerebral / Q000502:physiology; D004569:Electroencephalography / Q000379:methods; D005072:Evoked Potentials, Auditory; D006801:Humans; D007223:Infant; D011930:Reaction Time / Q000502:physiology*