Which cranial nerve is associated with movement of the tongue?

The hypoglossal nerve is the cranial nerve responsible for the movement of the tongue. It plays a crucial role in various functions, including swallowing, eating, and speaking, as it innervates the muscles that allow the tongue to move in different directions. This mobility is essential for manipulating food within the mouth and articulating speech.

In contrast, the vagus nerve primarily regulates autonomic functions, such as heart rate and digestion, rather than motor control of the tongue. The accessory nerve primarily controls neck and shoulder movements, again not directly related to tongue movement. The facial nerve is responsible for facial expressions and some aspects of taste but does not control the muscles involved in tongue movement.

Understanding the specific functions of each cranial nerve clarifies why the hypoglossal nerve is correctly associated with the movement of the tongue.