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Abnormalities of the first three steps of gait initiation in patients with Parkinson's disease with freezing of gait.

Okada Y, Fukumoto T, Takatori K, Nagino K, Hiraoka K - Parkinsons Dis (2011)

Bottom Line: The center of pressure (COP), heel contact positions, and spatiotemporal parameters were estimated from the vertical pressures on the surface of the force platform.Medial deviation of the COP from the first heel contact position had significant correlation with FOG questionnaire item 5.These findings indicate that weight shifting between the legs is abnormal and that medial deviation of the COP from the first heel contact position sensitively reflects the severity of FOG during the first three steps of gait initiation in PD patients with FOG.

View Article: PubMed Central - PubMed

Affiliation: Graduate School of Comprehensive Rehabilitation, Osaka Prefecture University, Osaka 583-8555, Japan.

ABSTRACT
The purpose of this study was to investigate abnormalities of the first three steps of gait initiation in patients with Parkinson's disease (PD) with freezing of gait (FOG). Ten PD patients with FOG and 10 age-matched healthy controls performed self-generated gait initiation. The center of pressure (COP), heel contact positions, and spatiotemporal parameters were estimated from the vertical pressures on the surface of the force platform. The initial swing side of gait initiation was consistent among the trials in healthy controls but not among the trials in PD patients. The COP and the heel contact position deviated to the initial swing side during the first step, and the COP passed medial to each heel contact position during the first two steps in PD patients. Medial deviation of the COP from the first heel contact position had significant correlation with FOG questionnaire item 5. These findings indicate that weight shifting between the legs is abnormal and that medial deviation of the COP from the first heel contact position sensitively reflects the severity of FOG during the first three steps of gait initiation in PD patients with FOG.

No MeSH data available.


Related in: MedlinePlus

Spatiotemporal and kinesiological parameters. A trace in the middle of the figure indicates the COP trajectory. Open circles indicate COP peaks. Open triangles indicate heel contact positions.
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fig1: Spatiotemporal and kinesiological parameters. A trace in the middle of the figure indicates the COP trajectory. Open circles indicate COP peaks. Open triangles indicate heel contact positions.

Mentions: The 1st COP peak displacement was defined as the COP most deviated to the initial swing side before the first heel off (Figure 1). The 2nd COP peak displacement was defined as the COP most deviated to the initial stance side. The 3rd COP peak displacement was defined as the COP most deviated to the initial swing side after the 1st heel contact. The 4th COP peak displacement was defined as the COP most deviated to the initial stance side after the 2nd heel contact.


Abnormalities of the first three steps of gait initiation in patients with Parkinson's disease with freezing of gait.

Okada Y, Fukumoto T, Takatori K, Nagino K, Hiraoka K - Parkinsons Dis (2011)

Spatiotemporal and kinesiological parameters. A trace in the middle of the figure indicates the COP trajectory. Open circles indicate COP peaks. Open triangles indicate heel contact positions.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3140034&req=5

fig1: Spatiotemporal and kinesiological parameters. A trace in the middle of the figure indicates the COP trajectory. Open circles indicate COP peaks. Open triangles indicate heel contact positions.
Mentions: The 1st COP peak displacement was defined as the COP most deviated to the initial swing side before the first heel off (Figure 1). The 2nd COP peak displacement was defined as the COP most deviated to the initial stance side. The 3rd COP peak displacement was defined as the COP most deviated to the initial swing side after the 1st heel contact. The 4th COP peak displacement was defined as the COP most deviated to the initial stance side after the 2nd heel contact.

Bottom Line: The center of pressure (COP), heel contact positions, and spatiotemporal parameters were estimated from the vertical pressures on the surface of the force platform.Medial deviation of the COP from the first heel contact position had significant correlation with FOG questionnaire item 5.These findings indicate that weight shifting between the legs is abnormal and that medial deviation of the COP from the first heel contact position sensitively reflects the severity of FOG during the first three steps of gait initiation in PD patients with FOG.

View Article: PubMed Central - PubMed

Affiliation: Graduate School of Comprehensive Rehabilitation, Osaka Prefecture University, Osaka 583-8555, Japan.

ABSTRACT
The purpose of this study was to investigate abnormalities of the first three steps of gait initiation in patients with Parkinson's disease (PD) with freezing of gait (FOG). Ten PD patients with FOG and 10 age-matched healthy controls performed self-generated gait initiation. The center of pressure (COP), heel contact positions, and spatiotemporal parameters were estimated from the vertical pressures on the surface of the force platform. The initial swing side of gait initiation was consistent among the trials in healthy controls but not among the trials in PD patients. The COP and the heel contact position deviated to the initial swing side during the first step, and the COP passed medial to each heel contact position during the first two steps in PD patients. Medial deviation of the COP from the first heel contact position had significant correlation with FOG questionnaire item 5. These findings indicate that weight shifting between the legs is abnormal and that medial deviation of the COP from the first heel contact position sensitively reflects the severity of FOG during the first three steps of gait initiation in PD patients with FOG.

No MeSH data available.


Related in: MedlinePlus