One day while gardening, Gene tripped over a coil of wound-up hose and fell face first on the pavement. He suffered damage to his hippocampal region, and while recovering in the hospital, he consistently greeted his friends and family as though he was seeing them again for the first time in ages, and during the day he often forgot what he was doing. However, he could still recall, without effort, adventures from his teenage years. Most likely, Gene had what would be called