caa a22 4500 445351918 CHVBK 20180317142846.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s00221-011-2691-2 doi (NATIONALLICENCE)springer-10.1007/s00221-011-2691-2 Reaction times for allocentric movements are 35ms slower than reaction times for target-directed movements [Elektronische Daten] [Lore Thaler, Melvyn Goodale] Many movements that people perform every day are directed at visual targets, e.g., when we press an elevator button. However, many other movements are not target-directed, but are based on allocentric (object-centered) visual information. Examples of allocentric movements are gesture imitation, drawing or copying. Here, show a reaction time difference between these two types of movements in four separate experiments. In Exp. 1, subjects moved their eyes freely and used direct hand movements. In Exp. 2, subjects moved their eyes freely and their movements were tool-mediated (computer mouse). In Exp. 3, subjects fixated a central target and the visual field in which visual information was presented was manipulated. Experiment 4 was identical to Exp. 3 except for the fact that visual information about targets disappeared before movement onset. In all four experiments, reaction times in the allocentric task were approximately 35ms slower than they were in the target-directed task. We suggest that this difference in reaction time between the two tasks reflects the fact that allocentric, but not target-directed, movements recruit the ventral stream, in particular lateral occipital cortex, which increases processing time. We also observed an advantage for movements made in the lower visual field as measured by movement variability, whether or not those movements were allocentric or target-directed. This latter result, we argue, reflects the role of the dorsal visual stream in the online control of movements in both kinds of tasks. Springer-Verlag, 2011 Allocentric nationallicence Hand movements nationallicence Reaction time nationallicence Speed-accuracy tradeoff nationallicence Lateral occipital cortex nationallicence Ventral nationallicence Dorsal nationallicence Thaler Lore Department of Psychology, The University of Western Ontario, Natural Sciences Centre, Room 245, N6A 5B7, London, ON, Canada aut Goodale Melvyn Department of Psychology, The University of Western Ontario, Natural Sciences Centre, Room 205, N6A 5B7, London, ON, Canada aut Experimental Brain Research Springer-Verlag 211/2(2011-06-01), 313-328 0014-4819 211:2<313 2011 211 221 https://doi.org/10.1007/s00221-011-2691-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-011-2691-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Thaler Lore Department of Psychology, The University of Western Ontario, Natural Sciences Centre, Room 245, N6A 5B7, London, ON, Canada aut NATIONALLICENCE 700 1- Goodale Melvyn Department of Psychology, The University of Western Ontario, Natural Sciences Centre, Room 205, N6A 5B7, London, ON, Canada aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 211/2(2011-06-01), 313-328 0014-4819 211:2<313 2011 211 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer