Hemispheric specialization during mental imagery of brisk walking.

[en] OBJECTIVES: Brisk walking, a sensitive test to evaluate gait capacity in normal and pathological aging such as parkinsonism, is used as an alternative to classical fitness program for motor rehabilitation and may help to decrease the risk of cognitive deterioration observed with aging. In this study, we aimed to identify brain areas normally involved in its control. METHODS: We conducted a block-design blood oxygen level dependent function magnetic resonance imaging (BOLD fMRI) experiment in 18 young healthy individuals trained to imagine themselves in three main situations: brisk walking in a 25-m-long corridor, standing or lying. Imagined walking time (IWT) was measured as a control of behavioral performance during fMRI. RESULTS: The group mean IWT was not significantly different from the actual walking time measured during a training session prior to the fMRI study. Compared with other experimental conditions, mental imagery (MI) of brisk walking was associated with stronger activity in frontal and parietal regions mainly on the right, and cerebellar hemispheres, mainly on the left. Presumed imagined walking speed (2.3 +/- 0.4 m/s) was positively correlated with activity levels in the right dorsolateral prefrontal cortex and posterior parietal lobule along with the vermis and the left cerebellar hemisphere. INTERPRETATIONS: A new finding in this study is that MI of brisk walking in young healthy individuals strongly involves processes lateralized in right fronto-parietal regions along with left cerebellum. These results show that brisk walking might be a non automatic locomotor activity requiring a high-level supraspinal control. Hum Brain Mapp, 2011. (c) 2011 Wiley-Liss, Inc.

Research center :

GIGA CRC (Cyclotron Research Center) In vivo Imaging-Aging & Memory - ULiège

Disciplines :

Neurology
Radiology, nuclear medicine & imaging

Author, co-author :

Cremers, Julien ; Université de Liège - ULiège > Département des sciences cliniques > Neurologie

Dessoullieres, Aurélie

Garraux, Gaëtan ; Université de Liège - ULiège > Département des sciences cliniques > Neurologie

Language :

English

Title :

Hemispheric specialization during mental imagery of brisk walking.

Publication date :

2011

Journal title :

Human Brain Mapping

ISSN :

1065-9471

eISSN :

1097-0193

Publisher :

Wiley Liss, Inc., New York, United States - New York

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]

Commentary :

Available on ORBi :

since 12 April 2011

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