Müller, Johannes Peter [key], 1801–58, German physiologist and anatomist. From 1833 until the end of his career he was professor at Berlin. He was famed as a teacher; for his extensive research in many fields, including embryology, general and microscopic pathology, biochemistry, comparative anatomy, psychology, and marine zoology; and for his theories on color vision and voice production. As a result of his experiments in neurology he proposed the law of specific energies, i.e., that each sensory nerve produces its own specific sensation (e.g., any stimulation to the optic nerve results in a sensation of light).
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