By Science ABC on youtube.com
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The limbic system is a collection of different parts of the brain grouped together and is responsible for emotions such as fear, aggression, sexual attraction, memory, learning, and smell. It is composed of the thalamus, hypothalamus, amygdala, and hippocampus, which are all connected to each other and other parts of the brain. Damage to the limbic system can cause a variety of symptoms, such as loss of fear, hypersexuality, decreased balance and coordination, and difficulty forming new memories. Scientists use brain imaging techniques to discover more about the brain and the limbic system, but many questions are still left to be answered."