HOSA Dental Terminology Practice

Lateral excursion measures which type of movement?

1. Upward movement of the jaw

2. Side-to-side movement of the mandible

3. Forward shifting of the lower jaw

4. Clockwise rotation of the jaw

The correct answer is: Side-to-side movement of the mandible

Lateral excursion specifically refers to the side-to-side movement of the mandible, which is crucial for various functions such as chewing and grinding food. This movement occurs when the jaw shifts laterally to one side while the other side remains stable. It allows for better occlusion and engagement between opposing teeth during mastication. Understanding this movement is important in dentistry for diagnosing and treating issues related to jaw function and alignment. The other types of movements mentioned do not describe lateral excursion. The upward movement pertains to vertical jaw actions like closing the mouth, while the forward shifting of the lower jaw indicates protrusive movement, which is entirely different. Clockwise rotation describes a rotational motion rather than a lateral shift, further distinguishing it from lateral excursion. Overall, knowing that lateral excursion encompasses side-to-side movement enhances comprehension of jaw mechanics in dental practice.