Parkinson's disease (PD) is a common, debilitating neurodegenerative disease. Gait
disturbances are a frequent cause of disability and impairment for patients with PD. This …

Variability raises considerable interest as a promising and sensitive marker of dysfunction in
physiology, in particular in neurosciences. Both internally (eg, pathology) and/or externally …

Hausdorff, Jeffrey M., Susan L. Mitchell, Renée Firtion, CK Peng, Merit E. Cudkowicz,
Jeanne Y. Wei, and Ary L. Goldberger. Altered fractal dynamics of gait: reduced stride …

Until recently, quantitative studies of walking have typically focused on properties of a typical
or average stride, ignoring the stride-to-stride fluctuations and considering these fluctuations …

Time series of human gait stride intervals exhibit fractal and multifractal properties under
several conditions. Records from subjects walking at normal, slow, and fast pace speed are …

We study the effects of Parkinson's disease (PD) on the long-term fluctuation and phase
synchronization properties of gait timing (series of interstride intervals) as well as gait force …

We present a random walk, fractal analysis of the stride-to-stride fluctuations in the human
gait rhythm. The gait of healthy young adults is scale-free with long-range correlations …

Variability indicates motor control disturbances and is suitable to identify gait pathologies. It
can be quantified by linear parameters (amplitude estimators) and more sophisticated …

Background The ability to maintain a steady gait rhythm is impaired in patients with
Parkinson's disease (PD). This aspect of locomotor dyscontrol, which likely reflects impaired …

Gait rhythm of patients with Parkinson's disease (PD), Huntington's disease (HD) and
amyotrophic lateral sclerosis (ALS) has been studied focusing on the fractal and correlation …