When the tractor-trailer hit her car, Sami suffered a concussion. Her memory was impaired and she could not recall events from the accident. Which brain structure was injured?

The answer is Hippocampus. The hippocampus have its place to the limbic system and plays significant roles in the joining of information from short-term memory (STM) to long-term memory (LTM), and in spatial memory that assists navigation. It is involved with learning and memory, especially the formation of new memories.