Journal article
Intracortical responses in human and monkey primary auditory cortex support a temporal processing mechanism for encoding of the voice onset time phonetic parameter
Cerebral cortex (New York, N.Y. 1991), Vol.15(2), pp.170-186
02/2005
DOI: 10.1093/cercor/bhh120
PMID: 15238437
Abstract
This study tests the hypothesis that temporal response patterns in primary auditory cortex are potentially relevant for voice onset time (VOT) encoding in two related experiments. The first experiment investigates whether temporal responses reflecting VOT are modulated in a way that can account for boundary shifts that occur with changes in first formant (F1) frequency, and by extension, consonant place of articulation. Evoked potentials recorded from Heschl's gyrus in a patient undergoing epilepsy surgery evaluation are examined. Representation of VOT varies in a manner that reflects the spectral composition of the syllables and the underlying tonotopic organization. Activity patterns averaged across extended regions of Heschl's gyrus parallel changes in the subject's perceptual boundaries. The second experiment investigates whether the physiological boundary for detecting the sequence of two acoustic elements parallels the psychoacoustic result of approximately 20 ms. Population responses evoked by two-tone complexes with variable tone onset times (TOTs) in primary auditory cortex of the monkey are examined. Onset responses evoked by both the first and second tones are detected at a TOT separation as short as 20 ms. Overall, parallels between perceptual and physiological results support the relevance of a population-based temporal processing mechanism for VOT encoding.
Details
- Title: Subtitle
- Intracortical responses in human and monkey primary auditory cortex support a temporal processing mechanism for encoding of the voice onset time phonetic parameter
- Creators
- Mitchell Steinschneider - Department of Neurology, Albert Einstein College of Medicine, Bronx, NY 10461, USA. steinsch@aecom.yu.eduIgor O VolkovYonatan I FishmanHiroyuki OyaJoseph C ArezzoMatthew A Howard III
- Resource Type
- Journal article
- Publication Details
- Cerebral cortex (New York, N.Y. 1991), Vol.15(2), pp.170-186
- Publisher
- United States
- DOI
- 10.1093/cercor/bhh120
- PMID
- 15238437
- ISSN
- 1047-3211
- eISSN
- 1460-2199
- Grant note
- R01 DC004290 / NIDCD NIH HHS DC000657 / NIDCD NIH HHS HD01799 / NICHD NIH HHS DC00120 / NIDCD NIH HHS
- Language
- English
- Date published
- 02/2005
- Academic Unit
- Neurology; Iowa Neuroscience Institute; Neurosurgery; Otolaryngology
- Record Identifier
- 9984020754602771
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