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Dynamic markers of altered gait rhythm in amyotrophic lateral sclerosis
1 Margret and H. A. Rey Laboratory for Nonlinear Dynamics in Medicine and 2 Gerontology Division, Beth Israel Deaconess Medical Center, Boston 02215; 3 Neurology Department, Massachusetts General Hospital, Boston 02114; and 4 Harvard Medical School, Boston, Massachusetts 02115 Amyotrophic latera...
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Published in: | Journal of applied physiology (1985) 2000-06, Vol.88 (6), p.2045-2053 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
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Online Access: | Get full text |
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Summary: | 1 Margret and H. A. Rey Laboratory for
Nonlinear Dynamics in Medicine and
2 Gerontology Division, Beth Israel Deaconess
Medical Center, Boston 02215; 3 Neurology
Department, Massachusetts General Hospital, Boston 02114; and
4 Harvard Medical School, Boston, Massachusetts
02115
Amyotrophic lateral sclerosis (ALS) is a
disorder marked by loss of motoneurons. We hypothesized
that subjects with ALS would have an altered gait rhythm, with an
increase in both the magnitude of the stride-to-stride fluctuations and
perturbations in the fluctuation dynamics. To test for this locomotor
instability, we quantitatively compared the gait rhythm of subjects
with ALS with that of normal controls and with that of subjects with
Parkinson's disease (PD) and Huntington's disease (HD), pathologies
of the basal ganglia. Subjects walked for 5 min at their usual pace
wearing an ankle-worn recorder that enabled determination of the
duration of each stride and of stride-to-stride fluctuations. We found that the gait of patients with ALS is less steady and more temporally disorganized compared with that of healthy controls. In addition, advanced ALS, HD, and PD were associated with certain common, as well
as apparently distinct, features of altered stride dynamics. Thus
stride-to-stride control of gait rhythm is apparently compromised with ALS. Moreover, a matrix of markers based on gait dynamics may be
useful in characterizing certain pathologies of motor control and,
possibly, in quantitatively monitoring disease progression and
evaluating therapeutic interventions.
nervous system diseases; Huntington's disease; Parkinson's
disease; motor control; nonlinear dynamics |
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ISSN: | 8750-7587 1522-1601 |
DOI: | 10.1152/jappl.2000.88.6.2045 |