Sex efficiency through exercises : special physical culture for women / by Th. H. van de Velde ; [photos, by E. Steinemann].
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The Muscular Apparatus of the Pelvic Floor, viewed from below. The skin, adipose tissue, superficial layer of muscles, together with the deep fascia, have been removed so as to expose the deeper layer of muscles—the levator group.* m. i. cav. = ischiocavernosus (see description of Plate I. con- cerning these muscles and their action on the crus clitoridis)—4' in this picture. /. = edge of the superficial fascia which has been cut through and removed. m. lev. vag. = levator vaginae (compare b and c in Plate IV., which indicate these muscles in section, whereas in this picture they are shown in their entirety). m. lev. a. = levator ani (cf. Plate I.) ; together with the last named and with the corresponding muscles on the other side, they form the levator group. That portion of the group represented by the levator vaginae is shown in a darker colour to differentiate it from the others ; it is thus made clear in the picture that this muscle, though it cannot be considered as an independent one from an anatomical point of view, stands apart as regards function. m. sph. a. = sphincter ani. 1. Symphysis pubis, covered by stiff connective tissue. 2. Tuber ischii. 3. Tip of the coccyx. 4. Corpus clitoridis. 4'. Crura clitoridis, corpora cavernosa clitoridis (two cylindrical portions of erectile tissue). 5. Labia minora, 6. Urethral orifice on the urethral prominence. 7. Vaginal orifice. 8. Anus. 9. Cut surface of the excised perineal muscles. 10. Obturator internus muscle. 11. Gluteus maximus. * The picture is drawn by Professor Kalmar, under the direction of the author, making part use of Plate XIV. in Eduard Martin's work, " The Gripping Mechanism of the Female Genitals."