The typical case is characterized by a sudden, complete inability to retain new information, lasting for several hours, in a middle-age or older person, with preservation of alertness and all other ...

A reader's friend had an episode where she seemed confused as to where she was and how she got there. They took her to the emergency room, where the doctor said she had an otherwise completely normal ...

Epilepsy is a disease marked by recurrent seizures, or sudden periods of abnormal, excessive or synchronous neuronal activity in the brain. One in 26 people in the U.S. will develop epilepsy at some ...

Anterograde amnesia is a type of memory loss that makes it difficult to form new memories. Brain damage or inflammation due to a head injury is often the cause of anterograde amnesia. Anterograde ...