402 



DISSECTION OF THE PERINEUM. 



wards the muscles, vessels, and nerves of the posterior half of the 



space are to be examined. (See description of the male perinaeum, p. 386 



to 392.) 



Next the skin is to be taken from the interior half of the perimval 

 space, as in the male; and the transverse incision in front is to be made 

 at the anterior part of the vulva. The attachments of the superficial fascia 

 are then to be looked to, and the cutaneous vessels and nerves are to be 

 traced beneath it (p. 392 to 394). 



Superficial fascia. The description of this fascia in the male will 

 serve for the like part in the female, with these modifications : that in the 

 female it is interrupted in the middle line, and is of less extent, in conse- 

 quence of the aperture of the vulva; and that it is continued forwards 

 through the labia majora (the representative of the scrotum) to the in- 

 guinal region. 



Fig. 134. 



THE MUSCLES op THE FEMALE PERINEUM, SUPERFICIAL ON RIGHT, AND DEEP ON LKFT SIDE 

 (from Savage and Luschka). 



1. Clitoris. 



2. Erector clitoridis. 



3. Jarjavay's muscle. 



4. Bulb of vagina. 



5. Transversus perinsei (reflected). 



6. Compressor bulbi (sphincter). 



7. Constrictor vagina 



8. Gland of Bartholin. 



9. Deep transversus perinsei. 



10. Superficial transversus perinsei. 



11. Posterior layer of triangular ligament. 



12. Sphincter ani. 



13. Triangular ligament. 



14. Levator ani. 



15. Ischio-perineal ligament. 



Dissection. The labia and the superficial fascia are to be removed, to 

 follow the sphincter muscle around the opening of the vagina. Two other 

 muscles are exposed at the same time, viz., the erector ciitoridis on the 

 pubic arch, and the transversalis perimei passing across the perinaeum to 

 the central point. 



The SPHINCTER VAGINA is an orbicular muscle around the orifice of 

 the vagina, and corresponds with the ejacttlator urinae in the male. Pos- 

 teriorly it is attached to the central point of the perineum, where it mixes 

 with the sphincter ani and transversalis muscles; and its fibres are directed 



