Relationship Between Electrical Brain Responses to Motor Imagery and Motor Impairment in Stroke

Therapies Monday, August 20th, 2012

Stroke.ahajournals.org:  8/14/12

Background and Purpose—New strategies like motor imagery based brain–computer interfaces, which use brain signals such as event-related desynchronization (ERD) or event-related synchronization (ERS) for motor rehabilitation after a stroke, are undergoing investigation. However, little is known about the relationship between ERD and ERS patterns and the degree of stroke impairment. The aim of this work was to clarify this relationship.

Methods—EEG during motor imagery and execution were measured in 29 patients with first-ever monolateral stroke causing any degree of motor deficit in the upper limb. The strength and laterality of the ERD or ERS patterns were correlated with the scores of the European Stroke Scale, the Medical Research Council, and the Modified Ashworth Scale. Read more

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