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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

Mediolateral displacement of COP peaks. Data columns indicate the mean, and error bars indicate standard errors of the mean. An asterisk indicates a significant difference between the groups (P < 0.05).
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fig3: Mediolateral displacement of COP peaks. Data columns indicate the mean, and error bars indicate standard errors of the mean. An asterisk indicates a significant difference between the groups (P < 0.05).

Mentions: The COP trajectory in PD patients tended to deviate to the posterior side and to the initial swing side as compared to that in healthy controls (Figure 2). The 1st COP peak displacement along the anteroposterior axis in PD patients was significantly smaller than that in healthy controls (P < 0.05). The 2nd to 4th COP peak displacements along the anteroposterior axis in PD patients were significantly posterior to those in healthy controls (P < 0.05). The 2nd to 4th COP peaks along the mediolateral axis in PD patients tended to deviate to the initial swing side as compared to those in healthy controls. We noted in particular that the deviation of the 3rd COP peak displacement along the mediolateral axis was significantly different between the groups, as shown in Figure 3 (P < 0.05).


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)

Mediolateral displacement of COP peaks. Data columns indicate the mean, and error bars indicate standard errors of the mean. An asterisk indicates a significant difference between the groups (P < 0.05).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig3: Mediolateral displacement of COP peaks. Data columns indicate the mean, and error bars indicate standard errors of the mean. An asterisk indicates a significant difference between the groups (P < 0.05).
Mentions: The COP trajectory in PD patients tended to deviate to the posterior side and to the initial swing side as compared to that in healthy controls (Figure 2). The 1st COP peak displacement along the anteroposterior axis in PD patients was significantly smaller than that in healthy controls (P < 0.05). The 2nd to 4th COP peak displacements along the anteroposterior axis in PD patients were significantly posterior to those in healthy controls (P < 0.05). The 2nd to 4th COP peaks along the mediolateral axis in PD patients tended to deviate to the initial swing side as compared to those in healthy controls. We noted in particular that the deviation of the 3rd COP peak displacement along the mediolateral axis was significantly different between the groups, as shown in Figure 3 (P < 0.05).

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