. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. 358 THE MUSCLES. tion, if at any time its position allows it to execute either of these twa movements. 9. Gemelli (Fig. 197, 8, 8, 9). Synonyms.— Ischio - trochanterius — Girard. (Gemini—Perctvall. Bifemoro - calcaneux — Leyh.) The two small muscles which receive this name are far from presenting the same arrangement in every subject; but we will describe that which appears to be the most frequent. Two little elongated muscular fasciculi are usually found, one above, the other below, the tendon common to the two
. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. 358 THE MUSCLES. tion, if at any time its position allows it to execute either of these twa movements. 9. Gemelli (Fig. 197, 8, 8, 9). Synonyms.— Ischio - trochanterius — Girard. (Gemini—Perctvall. Bifemoro - calcaneux — Leyh.) The two small muscles which receive this name are far from presenting the same arrangement in every subject; but we will describe that which appears to be the most frequent. Two little elongated muscular fasciculi are usually found, one above, the other below, the tendon common to the two portions of the obturator internus. These two fasciculi (Fig. 197, 8, 8), arise from the external border of the ischium, follow the direction of the above-mentioned tendon, and are inserted into it by the external extremities of their fibres, exactly representing^ the gemeUi of Man. But there is also a third (Fig. 191, 9), wide, flat, and often Fig. COCOTGEAL AND DEEP MUSCLES SURROUNDING THE COXO-FEMORAL ARTICULATION. 1» Erector coccygeus; 2, curvator coccygeus; 3, depressor coccygeus; 4, compressor coccygeus; 5^ deep gluteus; 6, rectus parvus; 7, tendon of the internal obturator; 8, 8, gemelli; 9, accessory fasciculus of the gemelli; 10. quadratus femoris; 11, sacro-sciatic ligament; 12, great sacro- Eciatic foramen; 13, superior ilio-sacral ligament; 14, inferior ilio-sacral ligament. very voluminous, situated between the preceding and the obturator extemus ; it is attached, by its inner border, to the external border of the ischium, contracting intimate adhesions with the other two and with the tendon of the obturator internus, and becoming inserted by the whole extent of its external border into the trochanteric fossa. Relations.—Posteriorly, to the sciatic nerves ; anteriorly, to the capsule of the hip-joint and the obturator externus, through the medium of an adipose cushion. Action.—Like the preceding muscle, these rotate the thigh outwards, and perha
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