Gray matter volume in the right angular gyrus is associated with differential patterns of multisensory integration with aging
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Hirst, R.J. and Whelan, R. and Boyle, R. and Setti, A. and Knight, S. and O'Connor, J. and Williamson, W. and McMorrow, J. and Fagan, A.J. and Meaney, J.F. and Kenny, R.A. and De Looze, C. and Newell, F.N., Gray matter volume in the right angular gyrus is associated with differential patterns of multisensory integration with aging, Neurobiology of Aging, 100, 2021, 83-90Download Item:
Abstract:
Multisensory perception might provide an important marker of brain function in aging. However, the cortical structures supporting multisensory perception in aging are poorly understood. In this study, we compared regional gray matter volume in a group of middle-aged (n = 101; 49–64 years) and older (n = 116; 71–87 years) adults from The Irish Longitudinal Study on Aging using voxel-based morphometry. Participants completed a measure of multisensory integration, the sound-induced flash illusion, and were grouped as per their illusion susceptibility. A significant interaction was observed in the right angular gyrus; in the middle-aged group, larger gray matter volume corresponded to stronger illusion perception while in older adults larger gray matter corresponded to less illusion susceptibility. This interaction remained significant even when controlling for a range of demographic, sensory, cognitive, and health variables. These findings show that multisensory integration is associated with specific structural differences in the aging brain and highlight the angular gyrus as a possible “cross-modal hub” associated with age-related change in multisensory perception.
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http://people.tcd.ie/fnewellhttp://people.tcd.ie/williawj
http://people.tcd.ie/rkenny
http://people.tcd.ie/asetti
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Neurobiology of Aging100
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http://dx.doi.org/10.1016/j.neurobiolaging.2020.12.004Metadata
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