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Title: | Prefrontal activity in Huntington's disease reflects cognitive and neuropsychiatric disturbances: The IMAGE-HD study. | Authors: | Stout J.C.;Gray M.A.;Egan G.F.;Ando A.;Churchyard A.;Chua P.;Georgiou-Karistianis N. | Institution: | (Gray, Egan, Ando, Chua, Stout, Georgiou-Karistianis) School of Psychology and Psychiatry, Faculty of Medicine, Nursing a Health Sciences, Monash University, Clayton, VIC, 3800, Australia (Egan, Ando) Howard Florey Institute, Florey Neuroscience Institutes, Parkville, VIC, 3052, Australia (Egan) Centre for Neuroscience, University of Melbourne, Parkville, VIC, 3052, Australia (Churchyard) Department of Neurology, Monash Medical Centre, Clayton, VIC, 3168, Australia (Gray, Egan) Monash Biomedical Imaging (MBI), Monash University, Melbourne, VIC, 3800, Australia (Gray) Centre for Advanced Imaging, Gehrmann Laboratory, The University of Queensland, St Lucia, 4072, Australia (Gray) The University of Queensland Centre for Clinical Research, Royal Brisbane and Women's Hospital, Herston, 4029, Australia | Issue Date: | 10-Dec-2012 | Copyright year: | 2013 | Publisher: | Academic Press Inc. (1250 Sixth Avenue, San Diego, California CA 92101, United States) | Place of publication: | United States | Publication information: | Experimental Neurology. 239 (1) (pp 218-228), 2013. Date of Publication: January 2013. | Abstract: | Functional integrity of prefrontal cortico-striatal circuits underlying executive functioning may be compromised by basal ganglia degeneration during Huntington's disease (HD). This study investigated challenged inhibitory attentional control with a shifting response-set (SRS) task whilst assessing neural response via functional magnetic resonance imaging (fMRI) in 35 healthy controls, 35 matched pre-symptomatic (pre-HD) and 30 symptomatic (symp-HD) participants. A >= 70% performance accuracy threshold allowed confident identification of neural activity associated with SRS performance in a sub-set of 33 healthy controls, 32 pre-HD and 20 symp-HD participants. SRS activated dorsolateral prefrontal and dorsal anterior cingulate cortices, premotor, parietal, and basal ganglia regions and deactivated subgenual anterior cingulate cortex. Symp-HD participants showed greater prefrontal functional responses relative to controls and pre-HD, including larger activations and larger deactivations in response to cognitive challenge, consistent with compensatory neural recruitment. We then investigated associations between prefrontal BOLD responses, SRS performance accuracy and neuropsychiatric disturbance in all participants, including those below SRS performance accuracy threshold. We observed that reduced prefrontal responsivity in symp-HD was associated with reduced accuracy in SRS performance, and with increased neuropsychiatric disturbance within domains including executive dysfunction, pathological impulses, disinhibition, and depression. These findings demonstrate prefrontal response during inhibitory attentional control usefully characterises cognitive and neuropsychiatric status in symp-HD. The functional integrity of compensatory prefrontal responses may provide a useful marker for treatments which aim to sustain cognitive function and delay executive and neuropsychiatric disturbance. © 2012 Elsevier Inc. | DOI: | http://monash.idm.oclc.org/login?url=http://dx.doi.org/10.1016/j.expneurol.2012.10.020 | PubMed URL: | 23123406 [http://www.ncbi.nlm.nih.gov/pubmed/?term=23123406] | ISSN: | 0014-4886 | URI: | https://repository.monashhealth.org/monashhealthjspui/handle/1/27545 | Type: | Article | Subjects: | anterior cingulate article attention BOLD signal brain dysfunction cognition *cognitive defect controlled study depression human *Huntington chorea inhibition (psychology) longitudinal study major clinical study *mental disease nerve cell prefrontal cortex priority journal task performance functional magnetic resonance imaging accuracy adult depression functional magnetic resonance imaging human *Huntington chorea inhibition (psychology) longitudinal study major clinical study *mental disease nerve cell prefrontal cortex priority journal task performance cognition brain dysfunction BOLD signal attention *cognitive defect controlled study article anterior cingulate adult accuracy |
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