title: Online Vision as a Function of Real-Time Limb Velocity: Another Case for Optimal Windows.
abstract: The efficiency of online visuomotor processes was investigated by manipulating vision based on real-time upper limb velocity. Participants completed rapid reaches under two control (full vision, no vision) and three experimental visual window conditions. The experimental visual windows were early: 0.8-1.4 m/s, middle: above 1.4 m/s, and late: 1.4 to 0.8 m/s. The results indicated that endpoint consistency comparable to that of full-vision trials was observed when using vision from the early (43 ms) and middle (89 ms) windows, but vision from the middle window entailed a longer deceleration phase (i.e., a temporal cost). The late window was not useful to implement online trajectory amendments. This study provides further support for the idea of early visuomotor control, which may involve multiple online control processes during voluntary movement.
authors.affiliation: a Faculty of Kinesiology and Physical Education , University of Toronto , Ontario , Canada.
authors.forename: Andrew
authors.initials: A
authors.lastname: Kennedy
authors.forename: Arindam
authors.initials: A
authors.lastname: Bhattacharjee
authors.forename: Steve
authors.initials: S
authors.lastname: Hansen
authors.forename: Connor
authors.initials: C
authors.lastname: Reid
authors.forename: Luc
authors.initials: L
authors.lastname: Tremblay
mesh_terms: D000054:Acceleration; D001132:Arm / Q000502:physiology; D001696:Biomechanical Phenomena; D023381:Endpoint Determination; D005121:Extremities / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009862:Online Systems; D010775:Photic Stimulation; D011597:Psychomotor Performance / Q000502:physiology; D014796:Visual Perception; D055815:Young Adult
keywords: online control; optimal; reaching; real-time; vision