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Differential habituation to repeated sounds in infants at high risk for autism

Guiraud, J.A. and Kushnerenko, Elena and Tomalski, Przemyslaw and Davies, K. and Ribeiro, H. and Johnson, Mark H. (2011) Differential habituation to repeated sounds in infants at high risk for autism. NeuroReport 22 (16), pp. 845-849. ISSN 0959-4965.

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It has been suggested that poor habituation to stimuli might explain atypical sensory behaviours in autism. We investigated habituation to repeated sounds using an oddball paradigm in 9-month-old infants with an older sibling with autism and hence at high risk for developing autism. Auditory-evoked responses to repeated sounds in control infants (at low risk of developing autism) decreased over time, demonstrating habituation, and their responses to deviant sounds were larger than responses to standard sounds, indicating discrimination. In contrast, neural responses in infants at high risk showed less habituation and a reduced sensitivity to changes in frequency. Reduced sensory habituation may be present at a younger age than the emergence of autistic behaviour in some individuals, and we propose that this could play a role in the over responsiveness to some stimuli and undersensitivity to others observed in autism.

Item Type: Article
Keyword(s) / Subject(s): auditory, autism, event-related potentials, habituation, infants, mismatch negativity
School: Birkbeck Schools and Research Centres > School of Science > Psychological Sciences
Research Centre: Brain and Cognitive Development, Centre for (CBCD)
Depositing User: Administrator
Date Deposited: 15 Nov 2011 11:11
Last Modified: 02 Dec 2016 11:45

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