Sokoli, Hava, Patchay, Sandhiran ORCID: 0000-0002-7013-8940, Thompson, Trevor ORCID: 0000-0001-9880-782X and Hobson, Hannah (2018) Exploration of motor cortical activity and anticipatory postural adjustments during gait initiation in young and older adults. In: British Psychological Society Cognitive Psychology Section Annual Conference, 29-31 Aug 2018, Liverpool, UK. (Unpublished)

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Abstract

Gait initiation is made possible by muscle-induced variations in vertical ground reaction forces (VGRF) under both feet (e.g. Patchay & Gahery, 2003). In addition, neuroimaging studies (e.g. Sahyoun, Floyer-Lea, Johansen-Berg & Matthews, 2004) have shown that the motor cortex is activated when participants imagined gait preparation and execution. However, VGRF studies and neuroimaging studies have essentially employed single-task conditions and overlooked dual-task conditions.
The current study aimed to examine motor cortical EEG activity and VGRF variations under both feet during gait initiation in healthy young and older participants. Twelve young (mean age= 23, SD=6.7) and thirteen older adults (mean age = 74.15, SD= 6.69) were required to initiate gait according to two different protocols (i) initiating gait only (simple gait initiation task); and (ii) initiating gait while carrying a full glass of water (complex gait initiation task).
Results show that older adults displayed reduced MRCP amplitudes in the simple gait initiation task but increased amplitudes in the complex gait initiation task in comparison to young adults. In addition, no significant group differences were observed in the patterns of VGRF during both, the simple and complex gait initiation tasks.

References
Sahyoun, C., Floyer-Lea, A., Johansen-Berg, H., & Matthews, P. M. (2004). Towards an understanding of gait control: brain activation during the anticipation, preparation and execution of foot movements. Neuroimage, 21(2), 568-575.
Patchay, S., & Gahéry, Y. (2003). Effect of asymmetrical limb loading on early postural adjustments associated with gait initiation in young healthy adults. Gait & Posture, 18(1), 85-94.

Item Type:	Conference or Conference Paper (Poster)
Uncontrolled Keywords:	gait initiation, older adults, motor related cortical potential, vertical ground reaction forces
Subjects:	B Philosophy. Psychology. Religion > BF Psychology
Faculty / School / Research Centre / Research Group:	Faculty of Education, Health & Human Sciences Faculty of Education, Health & Human Sciences > School of Human Sciences (HUM)
Related URLs:	Organisation
Last Modified:	16 Feb 2021 12:42
URI:	http://gala.gre.ac.uk/id/eprint/28102

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