The vagus nerve is a very important nerve which controls controls voice production, sensation of the throat and swallowing, amongst many other body functions.
The vagus nerve is also known as the "tenth" cranial nerve, which originates in the brain and travels through the neck with the carotid artery and internal jugular vein. The vagus nerve gives off branches which control voice production, swallowing and breathing.
The vagus nerve branch which controls voice production is the recurrent laryngeal nerve. The superior laryngeal nerve also branches from the vagus nerve and participates in swallowing.