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Gait initiation in Parkinson's disease
1Department of Neurology, University of Tübingen, Germany.
Movement Disorders : Official Journal of the Movement Disorder Society
|September 26, 1997
Summary
Parkinson's disease patients exhibit delayed gait initiation due to internal cueing deficits in the basal ganglia, not disordered movement sequences. This impacts movement preparation time, affecting the onset of walking sub-movements.
Area of Science:
- Neuroscience
- Movement Disorders
- Biomechanics
Background:
- Gait initiation is crucial for mobility and is often impaired in Parkinson's disease (PD).
- Understanding the kinematic patterns of gait initiation in PD is essential for developing targeted interventions.
Purpose of the Study:
- To investigate the kinematic patterns of gait initiation in individuals with Parkinson's disease compared to healthy controls.
- To determine if gait initiation deficits in PD stem from altered movement sequencing or preparation.
Main Methods:
- Utilized an optoelectronic tracking system (ELITE) to analyze gait initiation in 31 PD patients and 20 healthy controls.
- Measured movement preparation and execution times, analyzing the onset and duration of limb and trunk movements during the first stride.
Main Results:
- Parkinson's disease patients showed significantly increased movement preparation time.
- While movement execution times were similar, the onset of ankle, knee, hip, arm, and trunk movements was delayed in PD patients.
- The relative timing and sequence of sub-movements were preserved, indicating intact motor pattern generation.
Conclusions:
- Gait initiation deficits in Parkinson's disease are likely caused by basal ganglia dysfunction leading to internal cueing deficits.
- These deficits delay the onset and execution of movement sub-components rather than disrupting the overall sequence.