What motion is primarily allowed by the atlanto-occipital joint?

Study for the NPTE Physical Therapist Assistant Exam. Ace the test with comprehensive flashcards and multiple-choice questions. Each query offers hints and detailed explanations. Get thoroughly prepared for your examination!

The atlanto-occipital joint, which is located between the occipital bone of the skull and the first cervical vertebra (the atlas), primarily allows for flexion and extension movements. This joint is crucial in the nodding motion of the head, which is often described as "yes" motion. When the head tilts forward and backward, this action is facilitated by the atlanto-occipital joint.

While some limited side-bending can occur at this joint, and the spine as a whole allows for rotation, the dominant and most significant movements facilitated by the atlanto-occipital joint are indeed flexion and extension. Understanding the primary function of this joint is essential for appreciating head and neck movements and how they contribute to overall cervical spine function.

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