What causes memory loss after waking from a coma?

Memory loss: Memory loss subsequent to coma can depend upon the reason for the coma. Some patients in a coma were placed in a medically -induced one while others may have had a disease state that caused the coma. Some patients may have sustained brain injury and the type an location of the injured brain can impact the amount of memory loss.

Depends on cause: Whether memory loss occurs after coma depends on what caused the coma. For example a coma from some drug overdoses as long as heart and respirations don't stop may not have any memory loss, while coma after cardiac arrest or severe head injury can have severe memory loss. This is due to damage in certain areas of the brain.