Analyzing gait variability and dual-task interference in patients with Parkinson’s disease and freezing by means of the word-color Stroop test

Ana Francisca Rozin Kleiner, Aline S. Pagnussat, Giulia Di Prisco, Alessandro Vagnini, Fabrizio Stocchi, Maria Francesca de Pandis, Manuela Galli

Research output: Contribution to journalArticle

Abstract

The ability to carry out two tasks at once is critical to effective functioning in the real world and deficits are termed Dual-task interference or effect—DTE. DTE substantially compromised the gait of subjects with Parkinson’s disease and freezing of gait (PD + FOG), leading to exaggerated slowing, increasing gait dysrhythmicity, and inducing FOG episodes. This study aimed to investigate the DTE in gait variability of subjects with PD and freezing of gait (PD + FOG). Thirty-three patients with PD + FOG and 14 healthy individuals (REFERENCE) took part at this study. Two gait conditions were analyzed: usual walking (single task) and walking while taking the word-color Stroop test (dual task). The computed variables were as follows: gait velocity, step length, step timing, gait asymmetry, variability measures and DTE of each variable. The PD + FOG group has presented negative DTE values for all analyzed variables, indicating dual task cost. The REFERENCE group has presented dual-task benefits for step length standard deviation and step time. Differences between both groups and conditions were found for all variables, except for step time. Taking the word-color Stroop test while walking led to a larger dual-task cost in subjects with PD + FOG.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalAging clinical and experimental research
DOIs
Publication statusAccepted/In press - Dec 2 2017

Keywords

  • Dual task
  • Freezing of gait
  • Gait
  • Parkinson’s disease
  • Word-color Stroop test

ASJC Scopus subject areas

  • Ageing
  • Geriatrics and Gerontology

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