Motor imagery (M.I.) is a cognitive process in which movements are mentally evoked without overt actions. Behavioral and fMRI studies show a decline of explicit M.I. ability (e.g., the mental rehearsal of finger oppositions) with normal ageing: this decline is accompanied by the recruitment of additional cortical networks.However, none of these studies investigated behavioral and the related fMRI ageing modifications in implicit M.I. tasks, like the hand laterality task (HLT).To address this issue, we performed a behavioral and fMRI study: 27 younger subjects (mean age: 31 years) and 29 older subjects (mean age: 61 years) underwent two event-related design fMRI experiments. In the HLT, participants were asked to decide whether a hand rotated at different angles was a left or right hand. To test the specificity of any age related difference in the HLT, we used a letter rotation task as a control experiment: here subjects had to decide whether rotated letters were presented in a standard or a mirror orientation.We did not find any group difference in either behavioral task; however, we found significant additional neural activation in the elderly group in occipito-temporal regions: these differences were stronger for the HLT rather than for the LRT with group by task interactions effects in right occipital cortices.We interpret these results as evidence of compensatory processes associated with ageing that permit a behavioral performance comparable to that of younger subjects. This process appears to be more marked when the task specifically involves motor representations, even when these are implicitly evoked.

Zapparoli, L., Saetta, G., DE SANTIS, C., Gandola, M., Zerbi, A., Banfi, G., et al. (2016). When I am (almost) 64: The effect of normal ageing on implicit motor imagery in young elderlies. BEHAVIOURAL BRAIN RESEARCH, 303, 137-151 [10.1016/j.bbr.2016.01.058].

When I am (almost) 64: The effect of normal ageing on implicit motor imagery in young elderlies

ZAPPAROLI, LAURA
Primo
;
DE SANTIS, CARLO;GANDOLA, MARTINA;BANFI, GIUSEPPE
Penultimo
;
PAULESU, ERALDO
Ultimo
2016

Abstract

Motor imagery (M.I.) is a cognitive process in which movements are mentally evoked without overt actions. Behavioral and fMRI studies show a decline of explicit M.I. ability (e.g., the mental rehearsal of finger oppositions) with normal ageing: this decline is accompanied by the recruitment of additional cortical networks.However, none of these studies investigated behavioral and the related fMRI ageing modifications in implicit M.I. tasks, like the hand laterality task (HLT).To address this issue, we performed a behavioral and fMRI study: 27 younger subjects (mean age: 31 years) and 29 older subjects (mean age: 61 years) underwent two event-related design fMRI experiments. In the HLT, participants were asked to decide whether a hand rotated at different angles was a left or right hand. To test the specificity of any age related difference in the HLT, we used a letter rotation task as a control experiment: here subjects had to decide whether rotated letters were presented in a standard or a mirror orientation.We did not find any group difference in either behavioral task; however, we found significant additional neural activation in the elderly group in occipito-temporal regions: these differences were stronger for the HLT rather than for the LRT with group by task interactions effects in right occipital cortices.We interpret these results as evidence of compensatory processes associated with ageing that permit a behavioral performance comparable to that of younger subjects. This process appears to be more marked when the task specifically involves motor representations, even when these are implicitly evoked.
Articolo in rivista - Articolo scientifico
Ageing; FMRI; Hand laterality task; Implicit motor imagery;
Ageing; Hand laterality task; Implicit motor imagery; fMRI
English
2016
303
137
151
none
Zapparoli, L., Saetta, G., DE SANTIS, C., Gandola, M., Zerbi, A., Banfi, G., et al. (2016). When I am (almost) 64: The effect of normal ageing on implicit motor imagery in young elderlies. BEHAVIOURAL BRAIN RESEARCH, 303, 137-151 [10.1016/j.bbr.2016.01.058].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/102892
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