Please answer the following question: Given the following passage  "Emotions are thought to be related to certain activities in brain areas that direct our attention, motivate our behavior, and determine the significance of what is going on around us. Pioneering work by Broca (1878), Papez (1937), and MacLean (1952) suggested that emotion is related to a group of structures in the center of the brain called the limbic system, which includes the hypothalamus, cingulate cortex, hippocampi, and other structures. More recent research has shown that some of these limbic structures are not as directly related to emotion as others are while some non-limbic structures have been found to be of greater emotional relevance.",  answer the following question. Note that the answer is present within the text.  Question: What are the sections of the organ in a person's head that are concerned with sentimental experiences and are named after the Greek word for sea horse?
Answer:
hippocampi