In individuals with Parkinson’s disease (PD), visually guided saccades (VGSs) reportedly reflect general motor dysfunction and cognitive impairments. However, it has not been fully elucidated whether the VGS abnormalities result from nigrostriatal degeneration or other PD-related neural changes.

We measured VGS latency and gain in 50 PD…[Read more]

Colors with the highest sadness ratings were related to dark and dull bluish ones. On the other hand, lighter bluish colors mixed with green appearance were similarly congruent with both sadness and happiness. The lightness properties of these sadness-related bluish colors continuously represent sadness dominancy (sadness rating minus happiness…[Read more]