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Titolo:
PERI-THRESHOLD ENCODING OF STIMULUS FREQUENCY AND INTENSITY IN THE M100 LATENCY
Autore:
STUFFLEBEAM SM; POEPPEL D; ROWLEY HA; ROBERTS TPL;
Indirizzi:
UNIV CALIF SAN FRANCISCO,DEPT RADIOL,BIOMAGNET IMAGING LAB,BOX 0628,513 PARNASSUS AVE SAN FRANCISCO CA 94143 UNIV CALIF SAN FRANCISCO,DEPT RADIOL,BIOMAGNET IMAGING LAB SAN FRANCISCO CA 94143
Titolo Testata:
NeuroReport
fascicolo: 1, volume: 9, anno: 1998,
pagine: 91 - 94
SICI:
0959-4965(1998)9:1<91:PEOSFA>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN AUDITORY-CORTEX; EVOKED MAGNETIC-FIELDS; TONOTOPIC ORGANIZATION; HUMAN-BRAIN;
Keywords:
AUDITORY CORTEX; FUNCTIONAL IMAGING; MAGNETOENCEPHALOGRAPHY (MEG); TEMPORAL CODING; TONOTOPY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
S.M. Stufflebeam et al., "PERI-THRESHOLD ENCODING OF STIMULUS FREQUENCY AND INTENSITY IN THE M100 LATENCY", NeuroReport, 9(1), 1998, pp. 91-94

Abstract

RECENT work has suggested that, in addition to spatial tonotopy, pitch and timbre information may be encoded in the temporal activity of the auditory cortex. Specifically, the post-stimulus latency of the maximal cortical evoked neuromagnetic field (M100 or N1m) is a function ofstimulus frequency. We investigated the additional effect of varying the stimulus intensity on the M100 response. A 37-channel biomagnetometer recorded neuromagnetic fields over the temporal lobe of healthy volunteers in response to monaurally presented tones. The frequency dependence of the M100 latency remained remarkably invariant even at low stimulus intensity. Thus, for peri-threshold stimuli, frequency information appears encoded in the temporal form of the evoked response.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/02/20 alle ore 08:07:22