title: Handgrip strength deficits best explain limitations in performing bimanual activities after stroke.
abstract: [Purpose] To evaluate the relationships between residual strength deficits (RSD) of the upper limb muscles and the performance in bimanual activities and to determine which muscular group would best explain the performance in bimanual activities of chronic stroke individuals. [Subjects and Methods] Strength measures of handgrip, wrist extensor, elbow flexor/extensor, and shoulder flexor muscles of 107 subjects were obtained and expressed as RSD. The performance in bimanual activities was assessed by the ABILHAND questionnaire. [Results] The correlations between the RSD of handgrip and wrist extensor muscles with the ABILHAND scores were negative and moderate, whereas those with the elbow flexor/extensor and shoulder flexor muscles were negative and low. Regression analysis showed that the RSD of handgrip and wrist extensor muscles explained 38% of the variance in the ABILHAND scores. Handgrip RSD alone explained 33% of the variance. [Conclusion] The RSD of the upper limb muscles were negatively associated with the performance in bimanual activities and the RSD of handgrip muscles were the most relevant variable. It is possible that stroke subjects would benefit from interventions aiming at improving handgrip strength, when the goal is to increase the performance in bimanual activities.
authors.affiliation: Department of Physical Therapy, Universidade Federal de Minas Gerais, Brazil.
authors.forename: Marluce Lopes
authors.initials: ML
authors.lastname: Basílio
authors.affiliation: Department of Physical Therapy, Universidade Federal de Minas Gerais, Brazil.
authors.forename: Iza
authors.initials: I
authors.lastname: de Faria-Fortini
authors.affiliation: Department of Physical Therapy, Universidade Federal de Minas Gerais, Brazil.
authors.forename: Janaine Cunha
authors.initials: JC
authors.lastname: Polese
authors.affiliation: Department of Physical Therapy, Universidade Federal de Minas Gerais, Brazil.
authors.forename: Aline A
authors.initials: AA
authors.lastname: Scianni
authors.affiliation: Department of Physical Therapy, Universidade Federal de Minas Gerais, Brazil.
authors.forename: Christina Dcm
authors.initials: CD
authors.lastname: Faria
authors.affiliation: Department of Physical Therapy, Universidade Federal de Minas Gerais, Brazil.
authors.forename: Luci Fuscaldi
authors.initials: LF
authors.lastname: Teixeira-Salmela
keywords: Manual ability; Stroke; Upper limb strength