. The anatomy of the human body. Human anatomy; Anatomy. 206 MYOLOGY. dorsal vertebrae ; 2. From the articular tubercles and the angular depression formed be- tween them and the transverse processes of the four inferior cervical vertebrae ; 3. Some- times from the spinous processes of the seventh cervical and two upper dorsal vertebrae: it is inserted upon the side of the external occipital crest into the inner half of the rough space comprised between the two semicircular lines. The origins of this muscle con- sist of tendons, from which the inferior fleshy fibres pass vertically upward, the
. The anatomy of the human body. Human anatomy; Anatomy. 206 MYOLOGY. dorsal vertebrae ; 2. From the articular tubercles and the angular depression formed be- tween them and the transverse processes of the four inferior cervical vertebrae ; 3. Some- times from the spinous processes of the seventh cervical and two upper dorsal vertebrae: it is inserted upon the side of the external occipital crest into the inner half of the rough space comprised between the two semicircular lines. The origins of this muscle con- sist of tendons, from which the inferior fleshy fibres pass vertically upward, the superior ones obliquely inward and upward, becoming gradually shorter and more nearly horizon- tal. The muscular fibres are interrupted by some very remarkable tendinous intersec- tions. Thus, on the inside, the fleshy fasciculus arising from the sixth, fifth, and fourth dorsal vertebrae, gives origin to a tendon, which proceeds along the inner edge of the muscle, and, at the distance of an inch and a half or two inches, becomes the origin of another fleshy fasciculus, which is attached to the side of the occipital crest; hence the name of biventer cervicis, given by Eustachius to the whole complexus, and by Albinus to this inner portion only (m, Jig. 107). More externally, there is another flat tendon ex- tending along the posterior surface of the muscle, from the outer edge of which an apo- neurotic intersection passes in a zigzag course obliquely outward and upward. It is not uncommon to find another small digastric fasciculus with a separate tendon, on the an- terior surface of the muscle. Relations.—The complexus is covered by the trapezius, splenius, longissimus dorsi, transversalis colli, and trachelo-mastoid, and covers the transverso-spinalis and the recti and obliqui capitis. Its inner edge is separated from the muscle of the opposite side by a considerable quantity of adipose tissue, and by a prolongation of the ligamentum nuchae. The Inter-spinales Colli. The inte
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