Read the passage and determine its text structure!
You may think it’s bad to forget your homework, but what if you forgot who you were? Amnesia is a condition where a person loses some of their memories, like details about their personal identity, but still may remember how to do things, like play a piano. One type of Amnesia is called post-traumatic amnesia. Post-traumatic amnesia is usually due to a head injury (like a serious fall or knock on the head). The degree of memory loss may be related to the force of the injury. A simple whiplash may cause a person to forget the moments before the accident, but a more severe injury may cause a greater loss. For example, the victim may not remember who certain people are or may forget details about their own identities.