Claim: The Obliquus capitis superior muscle is a muscle in the upper back belonging in the suboccipital nerve (the dorsal primary ramus of the first cervical nerve (C1)) where its origin is in the lateral mass of atlas, its insertion in the lateral half of the inferior nuchal line.
Evidence: The obliquus capitis superior muscle (/əˈblaɪkwəs ˈkæpɪtɪs/) is a small muscle in the upper back part of the neck and is one of the suboccipital muscles and part of the suboccipital triangle.