In this deep dissection of lateral pelvic muscles, the superficial gluteal m. (1), is reflected dorsally. The middle gluteal m. (2) has been transected and reflected to reveal a piriformis m. (3) component. A probe separates the piriformis m. from the deep gluteal m. (4). The probe pass deep to the sacrotuberous ligament (arrow) to which the biceps femoris m. (5) and the superficial gluteal m. attach in the dog. The sciatic n. (asterisk) runs dorsal and caudal to the hip joint. Notice the semitendinosus m. (6) and tensor fasciae latae m. (7).

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