Nursing Entrance Exam (NEX) Practice Exam

The joint that allows for nodding movements of the head is the atlanto-occipital joint. This joint is located between the atlas (the first cervical vertebra) and the occipital bone at the base of the skull. It is a pivotal joint that enables the head to move in a nodding motion, which is essential for actions such as saying "yes."

The design of the atlanto-occipital joint permits flexion and extension of the head, essential for these nodding movements. This joint's structure allows a significant range of motion in the anterior-posterior direction, which is crucial for head positioning and movement.

Other joints mentioned do not facilitate this specific movement; for instance, the coxal joint (hip joint) is involved in lower limb mobility, the temporomandibular joint (jaw joint) is primarily responsible for movements related to chewing and speaking, and the glenohumeral joint (shoulder joint) facilitates movements of the arm rather than the head. Thus, the atlanto-occipital joint plays a unique and critical role in the specific range of motion associated with nodding the head.