Biomechanic modeling of sit-to-stand to upright posture for mobility assessment of persons with chronic stroke.
Arch Phys Med Rehabil
; 87(5): 635-41, 2006 May.
Article
em En
| MEDLINE
| ID: mdl-16635625
ABSTRACT
OBJECTIVE:
To test the suitability of using biomechanic measures associated with a minimum measured input model (MMIM) approach to assess mobility of people with chronic stroke during the execution of a sit-to-stand (STS) to upright posture motor task.DESIGN:
Single group, observational.SETTING:
Institutional settings in the United States and Italy.PARTICIPANTS:
Twenty-nine subjects with chronic unilateral lower-limb impairments and resultant mobility limitations secondary to stroke.INTERVENTIONS:
Not applicable. MAIN OUTCOMEMEASURES:
Manual measurement of lower-limb strength; performance-based tests including repeated chair standing, walking speed, and standing balance; and ground reactions measured with a force platform during STS and upright posture. The ground reactions were fed to a telescopic inverted pendulum model of the musculoskeletal system. Parameters representing the model outputs were compared with performance-based and strength measures to assess, respectively, motor ability and impairment-related changes in subjects' motor strategies.RESULTS:
The parameters derived from the model effectively differentiated between motor strategies associated with different performance-based scores, and allowed the identification of relevant difficulties encountered in STS execution. These difficulties could be associated with different strength scores. This was also true for subjects scoring the maximum in both performance-based and strength tests.CONCLUSIONS:
The MMIM is a relatively inexpensive and noninvasive approach that enhances mobility assessment of hemiparetic subjects with different motor ability levels. It provides information that correlates well with performance-based and strength scores and, in addition, it allows for subject-specific motor strategy identification.
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Temas:
ECOS
/
Aspectos_gerais
Bases de dados:
MEDLINE
Assunto principal:
Postura
/
Acidente Vascular Cerebral
/
Avaliação da Deficiência
/
Limitação da Mobilidade
Tipo de estudo:
Prognostic_studies
Limite:
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Arch Phys Med Rehabil
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Itália