Age-related changes of movement patterns in discrete Fitts' task. - Archive ouverte HAL Access content directly
Journal Articles BMC Neuroscience Year : 2013

Age-related changes of movement patterns in discrete Fitts' task.


BACKGROUND: Inspired by the framework of dynamical system theory, we aimed at exploring how the behavioural repertoire of the sensorimotor system can be reshaped with aging. Our reasoning was founded on the assumption that, with age, some of the existing patterns can be destabilized or even lost. In the present paper, this issue was investigated through the study of age-related changes in the movement patterns that are used to perform a discrete Fitts' task. We analysed the performance of two groups of participants (young and older adults) across nine task difficulty levels, obtained via manipulation of target width. RESULTS: Two movement patterns were revealed by the fact that increase in the index of the difficulty (ID) was accommodated through either the lengthening of both acceleration (AT) and deceleration (DT) times (co-variation pattern), or only DT (dissociation pattern). Analysis of the discontinuity in ID-AT relation showed that young participants switched from the co-variation to the dissociation pattern as ID increased. Pattern switching was accompanied by concomitant changes in the variability of AT/DT ratio. Older adults, on the other hand, used the dissociation pattern regardless of the ID. Consequently, they showed neither an abrupt discontinuity in ID-AT relation nor significant changes in the variability of AT/DT ratio across difficulty levels. Though the dissociation pattern was adaptive in young adults for high accuracy constraints, in older adults, it compromised task performance for lower difficulty levels. CONCLUSION: These findings support the view that aging may result in a compression of the neuro-behavioural repertoire. In sensorimotor tasks, it can lead to a loss of multi-stability in terms of available movement patterns, thereby compromising the ability of the neuro-musculo-skeletal system to adapt and face task constraints.
Fichier principal
Vignette du fichier
1471-2202-14-145.pdf (449.16 Ko) Télécharger le fichier
1471-2202-14-145.xml (114.49 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Format : Other

Dates and versions

inserm-00906432 , version 1 (19-11-2013)



Rita Sleimen-Malkoun, Jean-Jacques Temprado, Eric Berton. Age-related changes of movement patterns in discrete Fitts' task.. BMC Neuroscience, 2013, 14 (1), pp.145. ⟨10.1186/1471-2202-14-145⟩. ⟨inserm-00906432⟩
112 View
143 Download



Gmail Facebook Twitter LinkedIn More