The paper defines and studies thin times which are random whose graph is contained in a countable union of graphs stopping with respect to reference filtration F. We show that generic time can be decomposed into thick parts, where the second avoiding all F-stopping times. Then, for given ?, we introduce F?, smallest right-continuous containing F making ? time, that, each F-martingale an F?-semi...

This study examined the effects of Parkinson's disease (PD) and its treatment on the speed of rapid arm movements to different target sizes in a simple reaction time task in 8 PD and 9 normal subjects. Testing in PD subjects occurred after an overnight fast from their medications and 1 hour after their usual 1st dose. They had longer reaction and movement times, both of which shortened followin...

The aim of the present study was to investigate how spatial attention influences directional manual and saccadic reaction times. Two experiments were carried out. In experiment 1 subjects were instructed to perform pointing responses toward targets that were located either in the same or the opposite hemifield with respect to the hemifield in which an imperative stimulus was presented. In exper...