Neuromagnetic Responses of the Human Auditory Cortex to On- and Offsets of Noise Bursts: Réponses neuromagnétiques du cortex auditif humain à l'établissement et l'extinction de salves de bruit
| Autor: | M. Pelizzone, Jari Hällström, L. Leinonen, Riitta Hari, O. V. Lounasmaa, J.P. Mäkelä |
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| Rok vydání: | 1987 |
| Předmět: |
Linguistics and Language
medicine.medical_specialty medicine.diagnostic_test Interstimulus interval Magnetoencephalography Stimulus (physiology) Audiology Auditory cortex Language and Linguistics Continuous noise Speech and Hearing Electrophysiology Amplitude Bruit medicine medicine.symptom Psychology |
| Zdroj: | International Journal of Audiology. 26:31-43 |
| ISSN: | 1708-8186 1499-2027 |
| DOI: | 10.3109/00206098709078405 |
| Popis: | Cortical sources of neuromagnetic responses to noise bursts were compared in 7 healthy humans. The earliest response, P40m, peaking about 40 ms after the stimulus onset, was followed by a prominent deflection in the opposite direction at about 100 ms (N100m) and by another peak at 200 ms (P200m). A sustained field, seen near the end of the 400- to 550-ms stimuli, ended with an off-response of the same polarity as N100m. All deflections could be explained by cortical activity within the Sylvian fissure. The source of P200m was anterior to other sources of the on-response, except P40m. When noise bursts, or pauses of equal duration in a continuous noise were presented to the subject, striking similarities were found between the 100-ms deflections of the on- and off-responses: both peaked at about the same latency; their estimated sources were close to each other in the supratemporal plane and their amplitudes depended in a similar way on the interstimulus interval (1.1-8.8 s). However, only the on-response ... |
| Databáze: | OpenAIRE |
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