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Introduction: Stroke is the third leading cause of disability in the world with 80% of stroke survivors suffering from some degree of motor impairment. Yet the degree of motor impairment and subsequent recovery varies largely between individuals. Whilst neurorehabilitation programmes are available, not all individuals benefit from them equally. Hence this literature review aims to summarise the current literature around the use of EEG in predicting the degree of motor impairment, recovery and response to training in stroke patients.
Methods: A non-systematic literature search of PubMed was conducted to identify articles reporting changes in brain oscillations in stroke patients.
Results: Here we discuss how changes in different parameters of brain oscillations, indices of different types of waves as well as EEG patterns are associated with different degrees of motor functions both in acute and chronic stages of stroke. The review demonstrates how the recovery of motor function depends on the re-establishment of symmetry between the two hemispheres and increased shift of activity from unaffected to the affected hemisphere and back to normal levels.
Conclusion: Recognition of such EEG patterns has furthered our understanding of the causal relationship between pathophysiological processes and motor function, opening further opportunities to identify biomarkers which will allow us to predict the response of individual to training and tailor the therapeutic intervention in a personalised way to maximise motor recovery after stroke.