Therapeutic effects of mirror therapy in patients after stroke

Impaired function of the upper extremity after a stroke is a common cause of persistent disability and decreased social activity. Mirror therapy is an effective method for correcting hand function after a stroke. This method triggers neuroplasticity and can accelerate the recovery of functions after a wide range of neurological disorders. Objective To evaluate the effect of mirror therapy on the regression of motor disorders in the paretic arm, functional and psychological disorders, the patient's functioning and quality of life, risk factors for recurrent stroke in the early recovery period of stroke. Material and methods We examined 219 patients after stroke, including 154 patients after ischemic stroke (IS) and 65 patients after hemorrhagic stroke (HS) in the early recovery period (21 days to 6 months). All patients received a standard medical rehabilitation course including medications, physical rehabilitation, and physiotherapeutic treatment. Patients were divided into four groups depending on the stroke type and the medical rehabilitation course received: two study treatment groups (post-IS and post-HS groups), which consisted of patients receiving the standard medical rehabilitation course and mirror therapy, and two comparison groups (post-IS and post-HS), in which patients received only the standard medical rehabilitation course. All patients before and after the medical rehabilitation course were evaluated for neurological disorders (NIHSS, Ashworth scale of muscle spasticity, Medical Research Council (MRC) Scale and handgrip test), functional limitations (Frenchay Arm Test, Hauser Ambulation Index, Rivermead Mobility Index, Functional Independence Measure (FIM), ICF), mental status («Visual Memory» and «10 Word Memory» methods, Schulte-Platonoff tables, Luscher color test, Hospital Anxiety and Depression Scale (HADS), Locus of Control Recovery Questionnaire), quality of life (EQ-5D), arterial hypertension (Arterial Hypertension in Adults. Clinical Guidelines, 2020). Results Addition of the mirror therapy to the standard course provided additional therapeutic effects: in patients with IS, the high tone of the paretic muscles of the arm significantly decreased (by 46%); the target blood pressure was achieved in 96% of patients; severe disorders of functional independence and depression regressed; significant changes of mental functions parameters (visual memory, shifting attention); improvement of activity and participation parameters (carrying in the hands, self-care, housekeeping). In patients with HS, the muscle strength of the paretic arm significantly increased (by 35%); the target blood pressure was achieved in all patients; improvement of mental functions (motivation, shifting attention, visual memory), activity and participation parameters (objects moving and manipulation, self-care), and decreased level of depression were observed. Conclusion The addition of mirror therapy to the standard of care for patients after stroke resulted in regression of neurological deficit, motor disorders in the paretic arm, improvement of emotions and motivation, mitigation of recurrent stroke risk factors, as well as significant impact on the cognitive functions and enhancement of patients' capabilities of self-care.