The Lewis body is the part of the brain that is responsible for regulating emotions and behavior. It was discovered by the French neurologist Charles Louis Finay de Luis in 1874.
The Lewis body is located in the brain stem and consists of two parts: the lateral and medial nuclei. The lateral nucleus is located in the left hemisphere of the brain and is responsible for the control of emotions and behavior, while the medial nucleus is located in the right hemisphere and is responsible for processing sensory information.
When a person experiences emotions such as anger, fear or joy, signals from various parts of the brain are transmitted to the lateral nucleus of the Lewis body. Here they are processed and sent back to the brain, where decisions are made about how to respond to these emotions.
In addition, the Lewis body plays an important role in regulating sleep and wakefulness. When a person falls asleep, signals from the brain are transmitted to the Lewis body, which begins to reduce activity and prepare the body for deep sleep.
Overall, the Lewis body is an important element of the nervous system and plays a key role in the regulation of emotions, behavior and sleep.