Hippocampus
The connection of hippocampus with memory was made by a famous report. This gave the results of the destruction of the hippocampi by surgery (an attempt to relieve epileptic seizures). The unexpected outcome of the surgery was severe anterograde and partial retrograde amnesia. The patient could not form new memories of events after his surgery, and could not remember any events that occurred just before his surgery. However, he did remember events from many years earlier, right back to his childhood.