What Causes Lack Of Movement In Leg After Having Brain Surgery?

my name is pradeep from andhrapradesh my younger brother had brain surgery his rightleg and right led is not moov properly he cannot work with his hand we show the many doctors in hyderabad lost 5years he is taking medecines we are diffirent doctors diffrent suggetion same doctors told they will gave injection for vane its will sole some of told vane its not working you have replace the vane what to doctor