The Effects of Unilateral and Bilateral Mirror Therapy on Upper Extremity Function of Stroke at Acute Stage.

The mirror box is placed on a table in the sagittal plane of the participant. The affected upper extremity of the participant is hidden in the morror box and the unaffected upper extremity is placed symmetrically. During the unilateral or bilateral mirror therapy, the participant is requested to execute a serial of movements and tasks and pay attention on observing the reflection of the unaffected side in the mirror simultaneously. In the bilateral mirror therapy, the participant also has to move the affected upper extremity simultaneously; while in the unilateral mirror therapy, the participant only keeps the affected side relaxed.