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The effect of attending to motor overflow on its voluntary inhibition in young and older adults
journal contributionposted on 2023-05-18, 12:49 authored by Addamo, PK, Maree Farrow, Bradshaw, JL, Moss, S, Georgiou-Karistianis, N
Motor overflow refers to involuntary movement or muscle activity coinciding with voluntary movement. We examined whether 16 young adults (18-30 years) and 16 older adults (50-80 years) could voluntarily inhibit overflow. Participants performed a finger pressing task, exerting 50% of their maximal force. Overflow was concurrently recorded in the non-task hand. In the first condition, participants were not made aware of their motor overflow. Then participants, though informed of it, were asked to ignore their overflow. Finally, participants were requested to inhibit overflow with, and then without visual feedback, or vice versa. Overflow was exacerbated when older adults were unaware of it, and was reduced once they were informed. For young adults there was no significant difference between these conditions. Both Age Groups could significantly reduce overflow when so requested, independent of visual feedback. Thus motor overflow can be modulated by higher order cognitive control with directed attention.
Publication titleBrain and Cognition: Journal of Clinical, Experimental, and Theoretical Research
Department/SchoolWicking Dementia Research Education Centre
PublisherAcademic Press Inc Elsevier Science
Place of publicationUnited States