Lucia has suffered an injury to one of the major structures of her limbic system. One of her symptoms is that she cannot seem to remember the layout of her own house. It is as if her mental map of the rooms, furniture, and other parts of her home have been scrambled up. It is most likely that the structure impacted by Lucia's injury is the .

Hippocampus

Explanation:

Hippocampus  is the part of limbic system present in temporal lobe that supports learning, memorizing ability , regulation of emotion, motivation etc.It hippocampus faces any damage then memory loss, inability in creation of new memory,Alzheimer,not able to retrieve earlier learned information etc can be experienced by the person.

According to the question,Lucia has damaged her hippocampus of limbic system in the accident due to injury.Thus, she is experiencing inability to retrieve her own house structure and other things of house .

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