“…Higher level visual processing occurs in the associative extra-striate regions surrounding the primary visual cortex, from the secondary visual cortex to the ventral occipital-temporal pathway and dorsal occipital-parietal pathway (Ungerleider & Haxby, 1994). In Huntington's disease (HD), an autosomal-dominant inherited neurodegenerative disorder, progressive structural changes in the posterior cerebral cortex can be detected in early stages of the disease, while frontal and temporal regions remain less affected (Johnson et al, 2015;Nana, Kim, Thu, Oorschot, & Tippett, 2014;Nopoulos et al, 2010;Rosas et al, 2008;Rüb et al, 2015;Tabrizi et al, 2009). The manifest stage of HD is clinically characterized by progressive motor disturbances such as chorea and dystonia, cognitive decline, and psychiatric symptoms (Bates et al, 2015;Roos, 2010).…”