Changes to online control and eye-hand coordination with healthy ageing
| Autor: | Jessica L. O'Rielly, Anna Ma-Wyatt |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male medicine.medical_specialty Adolescent Movement Significant group Biophysics Experimental and Cognitive Psychology Time pressure 050105 experimental psychology Visual processing Healthy Aging 03 medical and health sciences Young Adult 0302 clinical medicine Physical medicine and rehabilitation Feedback Sensory medicine Reaction Time Saccades Humans 0501 psychology and cognitive sciences Orthopedics and Sports Medicine Aged Eye–hand coordination 05 social sciences Eye movement Motor control General Medicine Hand Biomechanical Phenomena Saccade Visual Perception Female Healthy ageing Psychology 030217 neurology & neurosurgery Photic Stimulation Psychomotor Performance |
| Zdroj: | Human movement science. 59 |
| ISSN: | 1872-7646 |
| Popis: | Goal directed movements are typically accompanied by a saccade to the target location. Online control plays an important part in correction of a reach, especially if the target or goal of the reach moves during the reach. While there are notable changes to visual processing and motor control with healthy ageing, there is limited evidence about how eye-hand coordination during online updating changes with healthy ageing. We sought to quantify differences between older and younger people for eye-hand coordination during online updating. Participants completed a double step reaching task implemented under time pressure. The target perturbation could occur 200, 400 and 600 ms into a reach. We measured eye position and hand position throughout the trials to investigate changes to saccade latency, movement latency, movement time, reach characteristics and eye-hand latency and accuracy. Both groups were able to update their reach in response to a target perturbation that occurred at 200 or 400 ms into the reach. All participants demonstrated incomplete online updating for the 600 ms perturbation time. Saccade latencies, measured from the first target presentation, were generally longer for older participants. Older participants had significantly increased movement times but there was no significant difference between groups for touch accuracy. We speculate that the longer movement times enable the use of new visual information about the target location for online updating towards the end of the movement. Interestingly, older participants also produced a greater proportion of secondary saccades within the target perturbation condition and had generally shorter eye-hand latencies. This is perhaps a compensatory mechanism as there was no significant group effect on final saccade accuracy. Overall, the pattern of results suggests that online control of movements may be qualitatively different in older participants. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect