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Rectus capitis posterior minor muscle
The rectus capitis posterior minor (or rectus capitis posticus minor[citation needed]) is a muscle in the upper back part of the neck. It is one of the suboccipital muscles. Its inferior attachment is at the posterior arch of atlas; its superior attachment is onto the occipital bone at and below the inferior nuchal line. The muscle is innervated by the suboccipital nerve (the posterior ramus of first cervical spinal nerve). The muscle acts as a weak extensor of the head.
The rectus capitis posterior minor muscle is one of the suboccipital muscles.
The muscle extends vertically superior-ward from its inferior attachment to its superior attachment. The muscle becomes broader superiorly.
The inferior attachment is (by a narrow tendon) onto the posterior tubercle of the posterior arch of atlas.
Its superior attachment is onto the medial portion of the inferior nuchal line and the external surface of the occipital bone inferior to it (between this line superiorly and the foramen magnum inferiorly).
The muscle usually also additionally attaches onto the posterior atlantooccipital membrane (which is in turn attached onto adjacent dura mater of the spinal canal).
The muscle receives motor innervation from the suboccipital nerve (the posterior ramus of cervical spinal nerve C1).
The muscle of either side may be doubled (along its length).
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Rectus capitis posterior minor muscle
The rectus capitis posterior minor (or rectus capitis posticus minor[citation needed]) is a muscle in the upper back part of the neck. It is one of the suboccipital muscles. Its inferior attachment is at the posterior arch of atlas; its superior attachment is onto the occipital bone at and below the inferior nuchal line. The muscle is innervated by the suboccipital nerve (the posterior ramus of first cervical spinal nerve). The muscle acts as a weak extensor of the head.
The rectus capitis posterior minor muscle is one of the suboccipital muscles.
The muscle extends vertically superior-ward from its inferior attachment to its superior attachment. The muscle becomes broader superiorly.
The inferior attachment is (by a narrow tendon) onto the posterior tubercle of the posterior arch of atlas.
Its superior attachment is onto the medial portion of the inferior nuchal line and the external surface of the occipital bone inferior to it (between this line superiorly and the foramen magnum inferiorly).
The muscle usually also additionally attaches onto the posterior atlantooccipital membrane (which is in turn attached onto adjacent dura mater of the spinal canal).
The muscle receives motor innervation from the suboccipital nerve (the posterior ramus of cervical spinal nerve C1).
The muscle of either side may be doubled (along its length).