Which cranial nerve is responsible for motor functions of the tongue and assists with swallowing and speech?

The cranial nerve that is responsible for motor functions of the tongue, as well as assisting with swallowing and speech, is the hypoglossal nerve. This nerve primarily innervates the muscles of the tongue, which are crucial for movements required during speaking and the swallowing process. The strength and coordination of these tongue movements are vital in articulating speech sounds and manipulating food in the mouth before swallowing.

The hypoglossal nerve's role is essential in coordinating the actions of the tongue, facilitating not only the physical act of swallowing but also aiding in clear speech production. Damage to this nerve can lead to difficulties in these functions, highlighting its importance in everyday activities such as eating and communication.