AEMCA Practice Exam

Which cranial nerve aids in tongue movement?

1. Accessory nerve

2. Hypoglossal nerve

3. Facial nerve

4. Auditory nerve

The correct answer is: Hypoglossal nerve

The hypoglossal nerve is the cranial nerve specifically responsible for the movement of the tongue. This nerve (cranial nerve XII) innervates all the intrinsic muscles of the tongue as well as most of the extrinsic muscles, allowing for precise movements necessary for speech and swallowing. An effective function of the hypoglossal nerve facilitates activities such as articulating speech sounds, manipulating food in the mouth, and pushing food toward the throat during the swallowing process. Understanding the role of the hypoglossal nerve highlights its importance in various functions relating to the oral cavity, underscoring the intricate relationship between cranial nerves and their specific physiological roles. This reinforces the knowledge that cranial nerves have specialized functions, making them integral to both motor and sensory processes in the body.