Three quarters of strokes occur in the region supplied by the middle cerebral artery. As a consequence, the upper limb will be affected in a large number of patients. Purpose of the study is to examine the effectiveness of mirror therapy in rehabilitation of hand function in sub-acute stroke.
Methodology: An experimental study design, 30 subjects with sub-acute stroke with impaired hand function randomly allocated 15 subjects into each experimental group and conventional group. Both groups received conventional physiotherapy. The experimental group in addition, received Mirror Therapy program of 30 repetition of each exercises per day for 5 days in a week for 4 weeks (total = 20 sessions). Hand functions were measured using Upper extremity motor activity log (UE MAL) and Action research arm test (ARAT) before and after 4 week of intervention.
Results: Results of the study suggested that both the experimental and conventional group had a significant improvement in hand function (AROM, functional task with objects, object manipulation), however experimental group showed significantly more improvement than conventional group, providing Mirror Therapy with conventional treatment is more effective than conventional treatment alone.
Conclusion: Mirror therapy with conventional physiotherapy brings more improvement in hand function than conventional physiotherapy alone.
World Health Organization [WHO; Stroke; 1989] defines the clinical syndrome of stroke as ‘rapidly developed clinical signs of focal (or global) distribution of cerebral function with symptoms lasting more than 24 hours or longer or leading to death, with no apparent cause other than vascular origin’.
Prevalence rates reported for stroke or CerebroVascular Accident (CVA) worldwide vary between 500 to 800 per 100,000 population [N.K. Sehi et al 2007] with about 20 million people suffer from stroke each year; out of that 5 million will die as a consequences and 15 million will survive with long term disabilities of varied spectrum. Many surviving stroke patients will often depends on other people‘s continuous support to survive.
Stroke is the most common cause of chronic disability . Of survivors, an estimated one third will be functionally dependent after 1 year experiencing difficulty with activities of daily living (ADL), ambulation, speech, and so forth . Cognitive impairment occurs frequently after stroke, commonly involving memory, orientation, language, and attention. The presence of cognitive impairment in patients with stroke has important functional consequences, independent of the effects of physical impairment (T K Tatemichi et al 1994).
Recovery of function after stroke may occur, but it is unclear whether interventions can improve function beyond the spontaneous process. In particular, recovery of hand function plateaus in about 1 year, and common knowledge is that the patient will remain at that level for the rest of his or her life [3,4]. Typically in such situations, upper arm function is better than that in the hand . An emerging concept in neural plasticity is that there is competition among body parts for territory in the brain [6-11].
Several studies have been conducted to examine the recovery of the hemiplegic arm in stroke patients. Up to 85% of patients show an initial deficit in the arm. Three to six months later, problems remain in 55% to 75% of patients [12-15]. While recovery of arm function is poor in a significant number of patients. Three quarters of strokes occur in the region supplied by the middle cerebral artery . As a consequence, the upper limb will be affected in a large number of patients. Functional recovery of the arm includes grasping, holding, and manipulating objects, which requires the recruitment and complex integration of muscle activity from shoulder to fingers.
Functional brain imaging studies of healthy subjects suggest that excitability of the primary motor cortex ipsilateral to a unilateral hand movement is facilitated by viewing a mirror reflection of the moving hand . Reorganization of motor functions immediately around the stroke site (ipsilesional) is likely to be important in motor recovery after stroke, and a contribution of other brain areas in the affected hemisphere is also possible. Activation when a subject is doing motor tasks can also occur in the bilateral inferior parietal area, the supplementary motor area, and in the premotor cortex. Furthermore, central adaptations occur in networks controlling the paretic as well as the nonparetic lower limb after stroke .
The aim of this study is to find the effect of mirror therapy in rehabilitation of hand function in sub-acute stroke. […]