Neck Articulations

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Atlantoccipital & Antlantoaxial Flexion Bending the joint resulting in a decrease of angle; moving the head Forward at the joint just below the skull. Longus capitis Rectus capitis anterior Sternocleidomastoid (anterior fibers) Extension / Hyperextension Straightening the joint resulting in an increase of angle; moving the head backward at the joint just below the skull. Semispinalis capitis Splenus capitis Rectus capitis posterior major Rectus capitis posterior minor Obliquus capitis superior Longissimus capitis Trapezius (upper fibers) Sternocleidomastoid (posterior fibers) Lateral Flexion (Abduction) Lateral movement away from the midline of the body; moving the head toward the shoulder (left or right) at a joint below the skull. See muscles responsible for Rotation Reduction (Adduction) Return to the anatomical position from lateral movement; moving the head upright away from the shoulder at a joint below the skull. See muscles responsible for Rotation   Rotation Rotary movement around the longitudinal axis of the bone; turning the head to the side (right or left) at a joint below the skull. Sternocleidomastoid Obliquus capitis inferior Obliquus capitis superior Rectus capitis lateralis Longissimus capitis Splenius capitis Semispinalis capitis Trapezius (upper fibers)    Notes Also see Spine for cervical involvement in neck movement. Mentioned articulations occur during concentric phase of exercise video examples.