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Reduced basal forebrain and hippocampal activation during memory encoding in girls with fragile X syndrome NEUROREPORT Greicius, M. D., Boyett-Anderson, J. M., Menon, V., Reiss, A. L. 2004; 15 (10): 1579-1583

Abstract

Fragile X syndrome (FraX), the most common heritable cause of developmental disability, is associated with IQ, memory, and visuospatial processing deficits. The fragile X gene (FMR1) is prominently transcribed in two regions critical to memory encoding and attention: the hippocampus and the basal forebrain. To probe functional MRI activation abnormalities associated with the disorder, girls with FraX and age-matched, normally-developing girls were scanned during a test of visual memory encoding. While there were considerable similarities in activation patterns between the two groups, the girls with FraX showed significantly less activation in the hippocampus and the basal forebrain. This is the first study, to our knowledge, demonstrating functional deficits in FraX subjects in brain regions known to have the highest FMR1 transcription.

View details for DOI 10.1097/01.wnr.0000134472.44362.be

View details for Web of Science ID 000225140700010

View details for PubMedID 15232287