. Anatomy of the woodchuck (Marmota monax). Woodchuck; Mammals. Chapter 4—Muscular System 73. Fig. 4-15. Pelvic limb of female, medial view. 1 iliocaudalis m., 2 pubocaudalis m., 3 ventromedial sacrocaudalis m., 4 obturator n., 5 internal iliac a., 6 common iliac a., 7 tendon of psoas minor m., 8 psoas major m., 9 external iliac a., 10 rectus abdominis m., 11 tensor fasciae latae m., 12 sartorius m., 13 pectineus m., 14 gracilis m. (cut), 15 adductor longus m., 16 rectus femoris m., 17 vastus medialis m., 18 adductor brevis m., 19 sartorius m. (cut), 20 gracillis m. (distal cut end), 21 medial
. Anatomy of the woodchuck (Marmota monax). Woodchuck; Mammals. Chapter 4—Muscular System 73. Fig. 4-15. Pelvic limb of female, medial view. 1 iliocaudalis m., 2 pubocaudalis m., 3 ventromedial sacrocaudalis m., 4 obturator n., 5 internal iliac a., 6 common iliac a., 7 tendon of psoas minor m., 8 psoas major m., 9 external iliac a., 10 rectus abdominis m., 11 tensor fasciae latae m., 12 sartorius m., 13 pectineus m., 14 gracilis m. (cut), 15 adductor longus m., 16 rectus femoris m., 17 vastus medialis m., 18 adductor brevis m., 19 sartorius m. (cut), 20 gracillis m. (distal cut end), 21 medial head of the deep digital flexor m., 22 tendon of superficial digital flexor m., 23 gastrocnemius m., 24 semitendinosus m., 25 semimembranosus m., 26 insertion of the m. internal oblique abdominal m. onto symphysis of pelvis, 27 anal sinus, 28 constrictor vestibuli m., 29 external anal sphincter m., 30 vagina, 31 rectum, 32 pelvic symphysis (cut). The constrictor vestibuli muscle, m. constrictor vestibuli, extends from the ventral surface of the anal sphincter, around the lateral border of the vag- inal vestibule of the female. Origin: Ventral border of the external anal sphincter muscle. Insertion: The muscles from the left and right sides meet ventral to the vestibule and insert on the surrounding fascia. Action: Constricts and elevates the vaginal ves- tibule. Innervation: N. perinealis profundus. PELVIC LIMB Sublumbar Muscles. The sublumbar mus- cles function as flexors of the hip joint. They extend from the sublumbar region to the medial aspect of the thigh. The major psoas muscle, m. psoas major (Fig. 4- 15), extends from the sublumbar region to the me- dial aspect of the thigh. Origin: From the ventrolateral aspect of all the lumbar vertebral bodies. Insertion: On the trochanter minor of the femur. Action: Flexion of the hip and lateral rotation of the femur. Innervation: Ventral branches of the lumbar spi- nal nerves. The iliacus muscle, m. iliacus, lies on the wing a
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