<prompt> Arnold nerve is a branch of:Vagus nerveHypoglossal nerveGlossopharyngeal nerveTrigeminal nerve  <response>: Ans. a Vagus nerveRef: Dhingras ENT 6th ed4 Arnolds nerve is the auricular branch also known as the mastoid branch of the vagus nerve CN X. It originates from the superior ganglion of the vagus nerve Arnolds nerve along with facial nerve innervates concha of auricle and the external acoustic meatus posterior and inferior wall. 