Ischaemic or haemorrhagic strokes and injuries are the main cause of motor or cognitive disability. Patients become incapable to performing the most common daily activities. Treatment and therapeutic aids are an expensive solution. Rehabilitation therapies based on the growing use of BCIs have proven to be effective. BCIs of this type apply a repetitive mechanical or electrical stimulus to a impaired body part. The stimulus must be applied within a time range from the imagined movement of the dysfunctional limb. The aim is to restore a connection between the central nervous system and the area of the body that has lost its function.