Friedrich Arnold was professor emeritus of anatomy and physiology at Heidelberg. He read medicine at the University of Heidelberg at the same time as his elder brother Johann Wilhelm Arnold (1801-1873).

Studied anatomy under Friedrich Tiedemann

Friedrich Tiedemann

Friedrich Tiedemann was a German anatomist and physiologist.He was born at Cassel, the eldest son of Dietrich Tiedemann , a philosopher and psychologist of considerable repute. He graduated in medicine at Marburg in 1804, but soon abandoned practice...

 (1781-1861) and Formann. He became a doctor of medicine on 7 September 1825.

The auricular branch

Alderman's nerve

The auricular branch of the vagus nerve is often termed the Alderman's nerve or Arnold's nerve. The latter name is an eponym for Friedrich Arnold.-Path:...

 of the vagus nerve

Vagus nerve

The vagus nerve , also called pneumogastric nerve or cranial nerve X, is the tenth of twelve paired cranial nerves...

 was nicknamed "Arnold's nerve" after he described the reflex of coughing when the ear is stimulated.

He was also privy counsellor

Privy council

A privy council is a body that advises the head of state of a nation, typically, but not always, in the context of a monarchic government. The word "privy" means "private" or "secret"; thus, a privy council was originally a committee of the monarch's closest advisors to give confidential advice on...

 in Heidelberg

Heidelberg

-Early history:Between 600,000 and 200,000 years ago, "Heidelberg Man" died at nearby Mauer. His jaw bone was discovered in 1907; with scientific dating, his remains were determined to be the earliest evidence of human life in Europe. In the 5th century BC, a Celtic fortress of refuge and place of...

.