Yoshihiro Itaguchi

Progressive micrographia in Parkinson’s disease is associated with multidimensional cognitive and motor features

Abstract Progressive micrographia, characterized by a gradual reduction in handwriting size, is a common yet incompletely understood feature of Parkinson’s disease (PD). It has been associated with both motor and cognitive impairment; however, the clinical characteristics associa...

Trajectory elevation in reach-to-grasp movements under increased arm weight and repeated trials

This study examined how three-dimensional upper-limb movement trajectories are modulated by changes in gravitational load. We hypothesized that individuals adopt a trajectory elevation strategy in reach-to-grasp movements performed on a desk to compensate for increased movement v...