ROGER HARRIS / SCIENCE PHOTO LIBRARY ROGER HARRIS / SCIENCE PHOTO LIBRARY
Reptilian and human brain. Computer artwork of a person's head showing a human (green) and reptile (orange) brain inside. This shows the difference in size and structure between the two brains. Among other differences the human brain has a much larger frontal lobe (upper right), an area thought to be involved in complex thought processes such as conscious thought and mood, motor function, problem solving, spontaneity, memory, language, judgement, impulse control, and social and sexual behaviour.
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