1. Universidade Federal do Rio Grande do Norte
2. Instituto do Cérebro
3. ICe - Artigos publicados em periódicos

Título:	Impaired Processing in the Primary Auditory Cortex of an Animal Model of Autism
Autor(es):	Anomal, Renata Figueiredo Villers-Sidani, Etienne de Brandão, Juliana Alves Diniz, Rebecca Costa, Marcos Romualdo Romcy-Pereira, Rodrigo Neves
Palavras-chave:	animal model of mental disorders;autism spectrum disorders (ASD);auditory perception;inhibitory neurons,;cortical mapping
Data do documento:	2015
Editor:	Universidade Federal do Rio Grande do Norte
Referência:	Anomal RF, de Villers-Sidani E, Brandão JA, Diniz R, Costa MR and Romcy-Pereira RN (2015) Impaired Processing in the Primary Auditory Cortex of an Animal Model of Autism. Front. Syst. Neurosci. 9:158. doi: 10.3389/fnsys.2015.00158
Resumo:	Autism is a neurodevelopmental disorder clinically characterized by deficits in communication, lack of social interaction and repetitive behaviors with restricted interests. A number of studies have reported that sensory perception abnormalities are common in autistic individuals and might contribute to the complex behavioral symptoms of the disorder. In this context, hearing incongruence is particularly prevalent. Considering that some of this abnormal processing might stem from the unbalance of inhibitory and excitatory drives in brain circuitries, we used an animal model of autism induced by valproic acid (VPA) during pregnancy in order to investigate the tonotopic organization of the primary auditory cortex (AI) and its local inhibitory circuitry. Our results show that VPA rats have distorted primary auditory maps with over-representation of high frequencies, broadly tuned receptive fields and higher sound intensity thresholds as compared to controls. However, we did not detect differences in the number of parvalbumin-positive interneurons in AI of VPA and control rats. Altogether our findings show that neurophysiological impairments of hearing perception in this autism model occur independently of alterations in the number of parvalbumin-expressing interneurons. These data support the notion that fine circuit alterations, rather than gross cellular modification, could lead to neurophysiological changes in the autistic brain
URI:	https://repositorio.ufrn.br/jspui/handle/123456789/19395
Aparece nas coleções:	ICe - Artigos publicados em periódicos

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