Hi, my brother in law met an accident after that he had head injury (internal). It is now 24 days after surgery, still he is unable to remember anything. No past memory, can not remember names, can not recognize his parents. I mean nothing, no memory. But yes he had etiquette, he knows how to talk, eat and dress. We are worried how long it will take to get his memory back. As per surgeon, it is left brain injury so will take time. How Long................