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Báo cáo khoa hoc:" Gait stability and variability measures show effects of impaired cognition and dual tasking in frail people"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Gait stability and variability measures show effects of impaired cognition and dual tasking in frail people | Lamoth et al. Journal of NeuroEngineering and Rehabilitation 2011 8 2 http www.jneuroengrehab.eom content 8 1 2 Hill JOURNAL OF NEUROENGINEERING NCR AND REHABILITATION RESEARCH Open Access Gait stability and variability measures show effects of impaired cognition and dual tasking in frail people 1 2 2 3 4 Claudine J Lamoth Floor J van Deudekom Jos P van Campen Bregje A Appels Oscar J de Vries Mirjam Pijnappels5 Abstract Background Falls in frail elderly are a common problem with a rising incidence. Gait and postural instability are major risk factors for falling particularly in geriatric patients. As walking requires attention cognitive impairments are likely to contribute to an increased fall risk. An objective quantification of gait and balance ability is required to identify persons with a high tendency to fall. Recent studies have shown that stride variability is increased in elderly and under dual task condition and might be more sensitive to detect fall risk than walking speed. In the present study we complemented stride related measures with measures that quantify trunk movement patterns as indicators of dynamic balance ability during walking. The aim of the study was to quantify the effect of impaired cognition and dual tasking on gait variability and stability in geriatric patients. Methods Thirteen elderly with dementia mean age 82.6 4.3 years and thirteen without dementia 79.4 5.55 recruited from a geriatric day clinic walked at self-selected speed with and without performing a verbal dual task. The Mini Mental State Examination and the Seven Minute Screen were administered. Trunk accelerations were measured with an accelerometer. In addition to walking speed mean and variability of stride times gait stability was quantified using stochastic dynamical measures namely regularity sample entropy long range correlations and local stability exponents of trunk accelerations. Results Dual tasking significantly p 0.05 decreased walking speed while stride time .