Dissociation between abnormal motor synergies and impaired reaching dexterity after stroke
Alkis M. Hadjiosif, Meret Branscheidt, Manuel A. Anaya, Keith D. Runnalls, Jennifer Keller, Amy J. Bastian, Pablo Celnik, John W. Krakauer
Abstract
Motor impairment is common after stroke and comprises reduced dexterity, weakness, and abnormal muscle synergies. Here we report that, when matched on an established synergy and weakness scale (Fugl-Meyer), patients with subacute stroke have worse reaching dexterity than chronic ones. This result suggests that the components of hemiparesis are dissociable and have separable mechanisms and, thus, may require distinct assessments and treatments.
Topics & Concepts
Physical medicine and rehabilitationNeurosciencePsychologyDissociation (chemistry)Stroke (engine)CommunicationAudiologyMedicinePhysicsChemistryThermodynamicsPhysical chemistryStroke Rehabilitation and RecoveryEEG and Brain-Computer InterfacesMotor Control and Adaptation