Neural repetition suppression to vocal and non-vocal sounds
Por:
Heurteloup C, Merchie A, Roux S, Bonnet-Brilhault F, Escera C and Gomot M
Publicada:
1 mar 2022
Ahead of Print:
1 ene 2022
Resumen:
Adaptation to the sensory environment is essential in everyday life, to anticipate future events and quickly detect and respond to changes; and to distinguish vocal variations in congeners, for communication. The aim of the current study was to explore the effects of the nature (vocal/non-vocal) of the information to be encoded, on the establishment of auditory regularities. In electrophysiology, neural adaptation is measured by the 'Repetition Positivity' (RP), which refers to an increase in positive potential, with the increasing number of repetitions of a same stimulus. The RP results from the combined variation of several ERP components; the P1, the first positivity (~100 ms) may reflect the onset of repetition effects. We recorded auditory evoked potentials during a roving paradigm in which trains of 4, 8 or 16 repetitions of the same stimulus were presented. Sequences of vocal and non-vocal complex stimuli were delivered, to study the influence of the type of stimulation on the characteristics of the brain responses. The P1 to each train length, and the RP responses were recorded between 90 and 200 ms, reflecting adaptation for both vocal and non-vocal stimuli. RP was not different between vocal and non-vocal sequences (in latency, amplitude and spatial organization) and was found to be similar to that found in previous studies using pure tones, suggesting that the repetition suppression phenomena is somehow independent of the nature of the stimulus. However, results showed faster stabilization of the P1 amplitude for non-vocal stimuli than for vocal stimuli, which require more repetitions. This revealed different dynamics for the establishment of regularity encoding for non-vocal and vocal stimuli, indicating that the richness of vocal sounds may require further processing before full neural adaptation occurs.(c) 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Filiaciones:
Heurteloup C:
UMR1253 iBrain, INSERM, University of Tours, France
Merchie A:
UMR1253 iBrain, INSERM, University of Tours, France
Roux S:
UMR1253 iBrain, INSERM, University of Tours, France
Bonnet-Brilhault F:
UMR1253 iBrain, INSERM, University of Tours, France
Escera C:
Brainlab Cognitive Neuroscience Research Group, Department of Clinical Psychology and Psychobiology, University of Barcelona, Catalonia-Spain
Institute of Neurosciences, University of Barcelona, Catalonia-Spain
Institut de Recerca Sant Joan de Déu (IRSJD), Catalonia-Spain
Gomot M:
UMR1253 iBrain, INSERM, University of Tours, France
Green Submitted, hybrid
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