Philipp Friedrich Arnold (Edenkoben, January 8, 1803 - Heidelberg, July 5, 1890) was a German professor emeritus in anatomy and physiology at the University of Heidelberg. He studied medicine at the University of Heidelberg, where his brother Johann Wilhelm Arnold (1801-1873) walked at the same time as a school. On September 7, 1825, he was dictated in medicine. He became second assistant of Friedrich Tiedemann. In 1828 he became a first assistant and 4 years later he became a professor at the University of Heidelberg.
In 1835 Arnold left the University of Heidelberg and worked for the following 17 years at the universities of Zurich, Freiburg im Breisgau and Tübingen. He accepted the professorship in Heidelberg in 1852, replacing Jacob Henle. Prior to retirement, he was, like Tiedemann, a member of numerous scientific committees and associations. He was also a member of the academic senate and dean of the medical school. Research
Arnold analyzed numerous human brain, his main field of research was the "nervus vagus" (the 10th brain nerve). The auricular branch of the nerve (a nerve that penetrates the skin around the ear) was initially described by him.
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