Hello, The vestibular Ball Exercises are the most suitable for head injury patients.place the patient on the ball and improve his balance by first providing a wide base of support then gradually reducing the base till the patient acquires a good control over it. give more importance to lateral displacement.
while seated on the ball you can ask the patient to lean forwards and reach an object. A mirror placed in front of the patient will boost his confidence as well as provide a feedback for him.