Answer:
Hippocampus.
Explanation:
Hippocampus area lies on either side of the brain. This is an important part of the limbic system of the organism. The main function of the hippocampus is the consolidation of the short term memory of an individual into long term memory.
Joe has a major accident. The hippocampus area of the brain is affected as he unable to memorize that he brushed hi teeth and takes many shower before bed time. Joe consolidation of short term memory has been failed into the long term memory.