The dopaminergic basis of cognitive and motor performance in Alzheimer's disease

Neurobiology of Disease
Suzanne J ReevesRichard Brown

Abstract

A crucial role of corticostriatal dopaminergic networks in cognitive and motor processes has been well established but largely unexplored in Alzheimer's disease (AD). The study investigated the relationship between striatal DA (D(2)) receptor availability and specific aspects of cognitive (sustained visual attention, spatial planning, word recognition) and motor (speed and dexterity) function in 24 people with mild to moderate AD. In vivo dopamine DA (D(2)) receptor availability was determined with [(11)C] raclopride (RAC) positron emission tomography (PET). Imaging data were analysed using both region of interest (ROI) and voxel-based approaches. Higher [(11)C] RAC binding was associated with increased motor speed and, paradoxically, poorer attentional performance. These findings are broadly consistent with previously conducted studies in healthy older adults and would suggest that the use of DA (D(2)) receptor agonists as an adjunctive treatment strategy in AD may have dissociable effects upon cognitive function.

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Citations

Feb 25, 2014·Brain, Behavior, and Immunity·Dafna LotanDaphna Joel
Oct 9, 2014·Journal of Neural Transmission·Shlomo Yehuda, Sharon Rabinovitz
Aug 23, 2012·Neuroscience and Biobehavioral Reviews·Suzanne J ReevesRobert J Howard
Mar 25, 2015·NeuroImage·Hunar AbdulrahmanAlexa M Morcom
Jul 26, 2017·International Journal of Geriatric Psychiatry·Emma McLachlanSuzanne Reeves
Dec 3, 2014·Annals of Neurology·Leigh ChristopherAntonio P Strafella

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