title: Manual aiming in healthy aging: does proprioceptive acuity make the difference?
abstract: The present study examines whether non-active older adults are more dependent on visual information when executing aiming movements and whether age-related declines in proprioception play a mediating role herein. Young (N = 40) and older adults (N = 38) were divided into physically active and non-active subgroups based on self-reported sports participation levels. In experiment 1, participants executed wrist-aiming movements with and without visual feedback. In experiment 2, passive proprioceptive acuity was assessed using wrist motion detection and position matching tests. Results showed similar aiming accuracy across age groups both with and without visual feedback, but older adults exhibited longer movement times, prolonged homing-in phase, and made more corrective submovements. Passive proprioceptive acuity was significantly affected by physical activity level and age, with participants in the active group scoring better than their non-active peers. However, these declines did not predict performance changes on the aiming task. Taken together, our observations suggest that decline in proprioceptive acuity did not predict performance changes on the aiming task and older adults were able to compensate for their decreased motion and position sense when allowed sufficient time. In line with these observations, we proposed that older adults are able to compensate for their decline in proprioception by increasing their reliance on predictive models.
authors.affiliation: Department of Kinesiology, Movement Control and Neuroplasticity Research Group, KU Leuven, Tervuursevest 101, 3001, Leuven, Belgium.
authors.forename: Werner F
authors.initials: WF
authors.lastname: Helsen
authors.affiliation: Department of Kinesiology, Movement Control and Neuroplasticity Research Group, KU Leuven, Tervuursevest 101, 3001, Leuven, Belgium.
authors.forename: Florian
authors.initials: F
authors.lastname: Van Halewyck
authors.affiliation: Department of Kinesiology, Movement Control and Neuroplasticity Research Group, KU Leuven, Tervuursevest 101, 3001, Leuven, Belgium. oron.levin@faber.kuleuven.be.
authors.forename: Oron
authors.initials: O
authors.lastname: Levin
authors.affiliation: Department of Kinesiology, Movement Control and Neuroplasticity Research Group, KU Leuven, Tervuursevest 101, 3001, Leuven, Belgium.
authors.forename: Matthieu P
authors.initials: MP
authors.lastname: Boisgontier
authors.affiliation: Department of Kinesiology, Movement Control and Neuroplasticity Research Group, KU Leuven, Tervuursevest 101, 3001, Leuven, Belgium.
authors.forename: Ann
authors.initials: A
authors.lastname: Lavrysen
authors.affiliation: Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Tom Reilly Building, Byrom Street, Liverpool, L3 3AF, UK.|Department of Kinesiology, McMaster University, 1280 Main Street West Ivor Wynne Centre Hamilton, Ontorio, L8S 4K1, Canada.
authors.forename: Digby
authors.initials: D
authors.lastname: Elliott
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging / Q000502:physiology*; D056228:Feedback, Sensory; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D011434:Proprioception / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time; D055815:Young Adult
keywords: Aging; Aiming performance; Motor control; Physical activity; Proprioception; Visual feedback