caa a22 4500 445350326 CHVBK 20180317142842.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s00221-011-2813-x doi (NATIONALLICENCE)springer-10.1007/s00221-011-2813-x The reliance on visual feedback control by older adults is highlighted in tasks requiring precise endpoint placement and precision grip [Elektronische Daten] [Rachel Coats, John Wann] There is an ongoing debate as to whether a greater degree of sensory-motor control is required to maintain skills as humans progress to be septuagenarians. Here, we investigate the dependence of older participants upon vision to execute skilled prehension movements. In a first experiment, participants were required to place a small, round peg in one of three randomly cued holes. A mirror apparatus was used to create conditions where they could always see the target locations, but vision of their hand approaching the target could be removed, and we explored end position accuracy. In a second experiment, we examined the ability of participants to precisely control their grasp action under conditions where they could see the objects but not their hands completing the action. The results showed that in Experiment 1, the older adults undershot the target in their primary submovement and hence had to move further in their secondary movement to achieve their goal. In Experiment 2, the older adults spent longer in the final adjustment phase (a near zero velocity phase at the end of the reach) when vision of the hand was unavailable. These findings suggest that older adults are indeed more reliant on visual feedback than the young in tasks that require precise manual control, and this clarifies conflicting accounts in the prior literature. Springer-Verlag, 2011 Elderly nationallicence Older adults nationallicence Prehension nationallicence Reaching nationallicence Visual feedback nationallicence Coats Rachel Department of Psychological and Brain Sciences, Indiana University, 1101 E 10th Street, 47405, Bloomington, IN, USA aut Wann John Department of Psychology, Royal Holloway University, London, UK aut Experimental Brain Research Springer-Verlag 214/1(2011-09-01), 139-150 0014-4819 214:1<139 2011 214 221 https://doi.org/10.1007/s00221-011-2813-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-011-2813-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Coats Rachel Department of Psychological and Brain Sciences, Indiana University, 1101 E 10th Street, 47405, Bloomington, IN, USA aut NATIONALLICENCE 700 1- Wann John Department of Psychology, Royal Holloway University, London, UK aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 214/1(2011-09-01), 139-150 0014-4819 214:1<139 2011 214 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer