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Mechanisms of Balance Disorders in a Seated Position Following a Stroke

NCT04152616 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 32

Last updated 2020-08-13

No results posted yet for this study

Summary

One of the causes of disability in stroke patients is postural disturbances that result in postural asymmetry in the standing position, characterized during an evaluation on a force platform by a greater displacement of the center of pressure towards the lesion side and thus by a greater percentage of weight on the lower limb (Weight -Bearing Asymmetry (WBA)). Today, the mechanisms of balance disorders in standing position are better understood. Indeed, in addition to sensory and motor deficits, spatial cognitive disorders also contribute to these postural disturbances, particularly in right brain damage stroke. This would be the reason why patients with right brain damage have a more precarious and time-consuming balance to re-educate than patients with lesions located in the left hemisphere.

Postural disturbances can also result in a disturbance of balance in the sitting position, which is a poor prognosis for the acquisition of transfers, standing and walking. To date, seated postural disturbances are not perfectly described with many differences in the explanatory mechanisms found in the literature. Thus, some people notice a more pronounced asymmetry on the medio-lateral plane while others find a more pronounced imbalance at the antero-posterior plane.

Sitting posture disorders benefit from few instrumental measurement tools outside clinical measurement scales. A very wide variety of evaluation methods by instrumental measurements are proposed and not validated. Sensor pad, which are usually used to adjust the bases of pressure ulcer patients, may be useful in quantifying the postural balance. But since the involvement of the head and trunk in the sitting posture is well documented in the literature, the addition of an evaluation of the position of the trunk and head seems essential. To our knowledge, no author has proposed to quantify sitting balance disorders by combining a measure of support asymmetry by taking into account the posture of the trunk with that of the head.

Conditions

  • Stroke Sequelae

Interventions

OTHER

Instrumental evaluation of posture

After a time of installation of the Optitrack® device's and two accelerometers (one placed on the subject's trunk facing the sternum fixed with a headband and the second at the level of the head also held with a headband), the subject will perform an evaluation of the balance sitting on the sensor pad; the movements of the head and trunk will be analyzed by the Optitrack® device and by the two accelerometers. The subject will perform 4 30-second tests, two with eyes open and two with eyes closed. A rest period may be taken between each assessment depending on the subject. During these evaluations, a physiotherapist will be present to avoid the risk of falling. After a rest period of 30 minutes, a new assessment of the sitting posture will be carried out to assess the reproducibility of the tools (sensor pad, accelerometers, Optitrack®).

Sponsors & Collaborators

  • Rennes University Hospital

    lead OTHER

Principal Investigators

  • Karim JAMAL · Rennes University Hospital

Study Design

Allocation
NA
Purpose
BASIC_SCIENCE
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2020-09-30
Primary Completion
2021-05-31
Completion
2021-11-30

Countries

  • France

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04152616 on ClinicalTrials.gov