. The anatomy of the domestic animals. Veterinary anatomy. Fig. 271.—Cross-section of Tail of H 1. 2, Branches of lateral coccygeal vessels and n die coccygeal artery: 4, sacro-coccygeus dorsalis; 4' geus lateralis: 5, 5', intertransversales; 6, sacro-coccygeus ven trails; 7, recto-coccygeus; 8, coccygeal fascia; 9, fibro-cartilagi between fourth and fifth coccygeal vertebrse. The veins are black 3, niid- 2. Sacro-coccygeus dorsalis (M. muscle lies along the dorso-median aspect of the tail, in contact with its fellow Origin.—The last three sac- ral spines and some of the coccy- geal spines. In
. The anatomy of the domestic animals. Veterinary anatomy. Fig. 271.—Cross-section of Tail of H 1. 2, Branches of lateral coccygeal vessels and n die coccygeal artery: 4, sacro-coccygeus dorsalis; 4' geus lateralis: 5, 5', intertransversales; 6, sacro-coccygeus ven trails; 7, recto-coccygeus; 8, coccygeal fascia; 9, fibro-cartilagi between fourth and fifth coccygeal vertebrse. The veins are black 3, niid- 2. Sacro-coccygeus dorsalis (M. muscle lies along the dorso-median aspect of the tail, in contact with its fellow Origin.—The last three sac- ral spines and some of the coccy- geal spines. Insertion.—The dorsal sur- face of the coccygeal vertebrae. Action.—Acting together, to elevate (extend) the tail; acting singly, to elevate and incline it laterally. Structiire.—The muscle has a strong rounded belly. It is in- serted by means of short tendons which fuse with those of the next muscle. Relations.—Superficially, the coccygeal fascia; medially, its fellow; laterally, the sacro-coccy- geus lateralis; deeply, the verte- brae. 3. Sacro-coccygeus lateralis (M. sacro-coccygeus dorsalis later- ahs).-—This muscle lies immedi- ately lateral to the preceding. Origin.—The sides of the. 1 Also termed the erector coccy- gis. ? Also known as the curvator coccygis. Fig. 272.—Muscles of Perineum of Horse. a, Coccygeus; b, retractor ani; c, c', sphincter ani externusr d, recto-coccygeus; e, sacro-coccygeus ventralis lateralis; /, retrac- tor penis; g, bulbo-cavernosus; h, ischio-cavernosus; i. internal pudic artery; k, anus; /, penis. (After EUenberger-Baum, Top. Anat. d. Pferdes.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Sisson, Septimus, 1865-1924. Philadelphia, London, W. B. Saunders Company
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