MUSCLES 49 



Bulbo-cavernosus, vel accelerator, vel ejaculator uriuae : 

 central perineal tendon and raphe(v) Posterior fibres. Under 

 surface of triangular ligament(F). Middle fibres surround bulb 

 and corpus spongiosum. Anterior fibres. Side of corpus 

 cavernosum, and united with one on opposite side it encases 

 dorsal vessels(A) (Deep perineal of pudic). [Compresses 

 bulbous urethra, discharging its contents.] 



Erector penis, vel ischio-cavernosus : internal surface of 

 tuber ischii(TF) internal and external surfaces of crus penis 

 (T) (Deep perineal of pudic). [Compresses crus and produces 

 erection.] 



Transversus perinaei : internal surface of tuber ischii(T) 

 central perineal tendon(p) (Deep perineal of pudic). [Draws 

 back and fixes central point of perineum.] 



Levator ani : posterior surface of pubis near symphysis, 

 spine of ischium, and between these two points from recto- 

 vesical fascia, along attachment of obturator fascia(T) central 

 perineal tendon, sides of rectum and coccyx(p) (Perineal of 

 pudic and Anterior division of 4th sacral). [Supports pelvic 

 viscera, compresses and raises lower part of rectum in defaeca- 

 tion.] Forms floor of pelvic cavity. 



Compressor vel constrictor urethras : internal surface of pubic 

 arch, posterior surface of triangular ligament(A) muscle of 

 opposite side(x) (Deep perineal of pudic). [Constricts urethra 

 and expels contents.] Surrounds membranous portion of urethra. 



Coccygeus : upper part of ischial spine, small sacro-sciatic 

 ligament(TF) side and anterior surface of coccyx and last 

 piece of sacrum(p) (Anterior division of 4th sacral). [Supports 

 pelvic floor.] 



Note. In the female the perineal muscles are essentially 

 the same : for erector penis, read erector clitoridis, inserted 

 into side of clitoris. The sphincter vagina, corresponding to 

 ejaculator urinae, is attached to the central tendon of the 

 perineum, and passing forwards on each side of the vagina 

 corpora cavernosa and body of clitoris. 



MUSCLES AND FASCIAE OF LOWER EXTREMITY. 



The FASCIA LATA of the thigh envelops the muscles and 

 surrounds the limb. Above it is attached to the back of the 

 sacrum and coccyx, to the iliac crest, to Poupart's ligament, 

 pubic body and ramus, ischial tuberosity and ramus, and to 

 the lower edge of the great sacro-sciatic ligament. The tlio- 

 tibial band is a thickened part attached above to the iliac crest 



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