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J Autism Dev Disord. 2011 Feb;41(2):248-53. doi: 10.1007/s10803-010-1040-9.

Brief report: Sensorimotor gating in idiopathic autism and autism associated with fragile X syndrome.

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  • 1Medical Investigation of Neurodevelopmental Disorders (M.I.N.D.) Institute, University of California-Davis, Medical Center, 2825 50th street, Sacramento, CA 95817, USA.

Abstract

Prepulse inhibition (PPI) may useful for exploring the proposed shared neurobiology between idiopathic autism and autism caused by FXS. We compared PPI in four groups: typically developing controls (n = 18), FXS and autism (FXS+A; n = 15), FXS without autism spectrum disorder (FXS-A; n = 17), and idiopathic autism (IA; n = 15). Relative to controls, the FXS+A (p < 0.002) and FXS-A (p < 0.003) groups had impaired PPI. The FXS+A (p < 0.01) and FXS-A (p < 0.03) groups had lower PPI than the IA group. Prolonged startle latency was seen in the IA group. The differing PPI profiles seen in the FXS+A and IA indicates these groups may not share a common neurobiological abnormality of sensorimotor gating.

PMID:
20521090
[PubMed - indexed for MEDLINE]
PMCID:
PMC3023021
Free PMC Article
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