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Titolo:
Between sound and perception: reviewing the search for a neural code
Autore:
Eggermont, JJ;
Indirizzi:
Univ Calgary, Dept Physiol & Biophys, Neurosci Res Grp, Calgary, AB T2N 1N4, Canada Univ Calgary Calgary AB Canada T2N 1N4 s Grp, Calgary, AB T2N 1N4, Canada Univ Calgary, Dept Psychol, Neurosci Res Grp, Calgary, AB T2N 1N4, Canada Univ Calgary Calgary AB Canada T2N 1N4 s Grp, Calgary, AB T2N 1N4, Canada
Titolo Testata:
HEARING RESEARCH
fascicolo: 1-2, volume: 157, anno: 2001,
pagine: 1 - 42
SICI:
0378-5955(200107)157:1-2<1:BSAPRT>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRIMARY AUDITORY-CORTEX; CONSONANT-VOWEL SYLLABLES; VOICE-ONSET TIME; AMPLITUDE-MODULATED SOUNDS; SPEECH-EVOKED ACTIVITY; STEADY-STATE VOWELS; ANTEROVENTRAL COCHLEAR NUCLEUS; NERVE FIBER RESPONSES; MEDIAL SUPERIOR OLIVE; SPECIES-SPECIFIC VOCALIZATION;
Keywords:
neural representation; neural transformation; neural coding; auditory system; neural synchrony; amplitude and frequency modulation; voice onset time; speech; vocalization;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
329
Recensione:
Indirizzi per estratti:
Indirizzo: Eggermont, JJ Univ Calgary, Dept Physiol & Biophys, Neurosci Res Grp, 2500Univ Dr NW, Calgary, AB T2N 1N4, Canada Univ Calgary 2500 Univ Dr NW Calgary AB Canada T2N 1N4 anada
Citazione:
J.J. Eggermont, "Between sound and perception: reviewing the search for a neural code", HEARING RES, 157(1-2), 2001, pp. 1-42

Abstract

This review investigates the roles of representation, transformation and coding as part of a hierarchical process between sound and perception. This is followed by a survey of how speech sounds and elements thereof are represented in the activity patterns along the auditory pathway. Then the evidence for a place representation of texture features of sound, comprising frequency, periodicity pitch, harmonicity in vowels, and direction and speed offrequency modulation, and for a temporal and synchrony representation of sound contours, comprising onsets, offsets, voice onset time, and low rate amplitude modulation, in auditory cortex is reviewed. Contours mark changes and transitions in sound and auditory cortex appears particularly sensitiveto these dynamic aspects of sound. Texture determines which neurons, both cortical and subcortical, are activated by the sound whereas the contours modulate the activity of those neurons. Because contours are temporally represented in the majority of neurons activated by the texture aspects of sound, each of these neurons is part of an ensemble formed by the combination of contour and texture sensitivity. A multiplexed coding of complex sound isproposed whereby the contours set up widespread synchrony across those neurons in all auditory cortical areas that are activated by the texture of sound. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 16:37:40