caa a22 4500 475768930 CHVBK 20180406123614.0 cr unu---uuuuu 170329e20000801xx s 000 0 eng 10.1023/A:1005521522418 doi (NATIONALLICENCE)springer-10.1023/A:1005521522418 Manual Function in Cebus apella. Digital Mobility, Preshaping, and Endurance in Repetitive Grasping [Elektronische Daten] [Marianne Christel, Dorothy Fragaszy] Manual dexterity varies across species of primates in accord with hand morphology and degree of fine motor control of the digits. Platyrrhine monkeys achieve less direct opposition between thumb and index finger than that of catarrhine primates, and many of them typically whole-hand grip. However, tufted capuchins (Cebus apella), exhibit a degree of independent control of the digits and effective thumb-forefinger opposition. We report how capuchins prehended small objects, with particular attention to the form of sequential fine movements of the fingers, choice of hand, and differences between the two hands in the temporal properties of reaching and grasping. We compare these actions across tasks with differing demands for fine motor control. For tasks that required all the digits to flex in synchrony, capuchins displayed smooth, fast, and efficient reach-to-grasp movements and a higher endurance than for tasks requiring more complex digital coordination. These latter tasks induced a slightly differentiated preshaping of the hand when approaching the objects, indicating preparation for grasping in advance of contact with the object. A right-hand preponderance for complex digital coordination was evident. The monkeys coordinated their fingers rather poorly at the substrate, and they took longer to achieve control of the objects when complex coordination was required than when simultaneous flexion was sufficient. We conclude that precise finger coordination is more effortful and less well coordinated, and the coordination is less lateralized, in capuchins than in catarrhine primates. Plenum Publishing Corporation, 2000 dexterity nationallicence movement coordination nationallicence hand asymmetry nationallicence precision grips nationallicence capuchin monkeys nationallicence Christel Marianne Fachbereich Biologie, Institut für Anthropologie und Humanbiologie, Freie Universität Berlin, Berlin, Germany aut Fragaszy Dorothy Department of Psychology, University of Georgia, Athens, Georgia, USA aut International Journal of Primatology Kluwer Academic Publishers-Plenum Publishers 21/4(2000-08-01), 697-719 0164-0291 21:4<697 2000 21 10764 https://doi.org/10.1023/A:1005521522418 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1005521522418 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Christel Marianne Fachbereich Biologie, Institut für Anthropologie und Humanbiologie, Freie Universität Berlin, Berlin, Germany aut NATIONALLICENCE 700 1- Fragaszy Dorothy Department of Psychology, University of Georgia, Athens, Georgia, USA aut NATIONALLICENCE 773 0- International Journal of Primatology Kluwer Academic Publishers-Plenum Publishers 21/4(2000-08-01), 697-719 0164-0291 21:4<697 2000 21 10764 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer