Rectus capitis posterior minor

  • The rectus capitis posterior minor (also rectus capitis posterior minor muscle, latin: musculus rectus capitis posterior minor) is one of the suboccipital muscles that acts at the atlanto-occipital joint.

    Origin

    The rectus capitis posterior minor originates from the tubercle on the posterior arch of the atlas, the first cervical vertebra (C1).

    Insertion

    The fibers of the rectus capitis posterior minor insert onto the external surface of the occipital bone - on the medial part of the inferior nuchal line and between the inferior nuchal line and the foramen magnum.

    Action

    The main function provided by the rectus capitis posterior minor is extension of the head.

    Innervation

    The rectus capitis posterior minor is innervated by the posterior ramus of the 1st cervical spinal nerve (C1), also known as the suboccipital nerve.