Changes to online control and eye-hand coordination with healthy ageing

O'Rielly, Jessica L.; Ma-Wyatt, Anna

doi:10.1016/j.humov.2018.04.013

Cited by 5 publications

(9 citation statements)

References 54 publications

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“…This is interesting because, as mentioned above, studies investigating age related performance in online control have largely focused on perturbations that occur early in the reach which are perhaps more easily accounted for than those which occur later. These findings would be in line with O’Rielly and Ma-Wyatt [18] who also found incomplete corrections to perturbations that occurred later in the reach despite an increase in reach duration.…”

Section: Introductionsupporting

confidence: 90%

“…This pattern of results is somewhat surprising given the incomplete nature of responses to target perturbations that occurred later in the reach, that is a decrease in both the correction frequency and overall accuracy. Incomplete updating for target perturbations that occur later in the reach has been demonstrated by a number of studies investigating disruptions to task requirements throughout the reach such as Liu and Todorov [2] and previous work by our group [18]. Given the research detailing a consistent sensorimotor delay when incorporating feedback into an ongoing movement [49] this was perhaps a bit surprising, especially considering the direction of effect and the overall performance across other measures in this condition.…”

Section: Discussionmentioning

confidence: 73%

“…The experimental apparatus configuration was in line with that described within O’Rielly and Ma-Wyatt [18]. Briefly, a system unit with an Intel(R) i7 core and processor speed of 3.07 GHz was used to execute program functions.…”

Section: Methodsmentioning

confidence: 99%

“…A diagram of the task procedure is presented in Fig 1A. The general double-step experimental procedure used has been described previously [18]. In this study, we altered the paradigm to explicitly quantify the latency of the corrective movement across conditions and age groups.…”

Section: Methodsmentioning

confidence: 99%

“…Participants were provided feedback regarding their reach duration but not accuracy. Feedback limits were informed by previous work within our lab [18]. We did this in an effort to introduce consistent timing which allowed us to investigate changes in reaching error associated with the target perturbation depending on when in the reach the perturbation occurred, either 0ms or 200ms, and quantify any changes in reaching error associated.…”

Section: Methodsmentioning

confidence: 99%

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The effect of age and perturbation time on online control during rapid pointing

O'Rielly¹,

Ma-Wyatt²

2019

PLoS ONE

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Visual and proprioceptive information is used differently at different phases of a reach. The time at which a target perturbation occurs during a reach therefore has a significant impact on how an individual can compensate for this perturbation though online control. With healthy ageing, there are notable changes to both sensory and motor control that impact motor performance. However, how the online control process changes with age is not yet fully understood. We used a target perturbation paradigm and manipulated the time at which a target perturbation occurred during the reach to investigate how healthy ageing impacts sensorimotor control. We measured how the latency of the correction and the magnitude of the corrective response changed with perturbation time and quantified the difference across groups using a percentage difference measure. For both groups, online corrections to early perturbations were more easily accounted for than those to late perturbations, despite late perturbations eliciting faster correction latencies. While there was no group difference in accuracy, older participants were slower overall and produced a correction to a change in target location proportionally less often despite similar correction latencies. We speculate that the differences in the time during the reach that the correction is first identified may explain the differences in correction latencies observed between the perturbation time conditions.

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Section: Introductionsupporting

confidence: 90%