CHAPTER XXIX. 



THE PERINEUM. 



ANATOMY EXTRAVASATION OF URINE 



PELVIC FASCIA RECTAL EXAMINATION 



URETHRA,SCROTUM,&c. DISEASES and REFLEX DIS- 

 LANDMARKS TURBANCES 



OPERATIONS 



The Perineum The anatomy of this region will 

 be very briefly referred to. The perineum is divided, by 

 an imaginary line joining the two ischial tuberosities, in- 

 to two parts, an anterior the urethral triangle, and a 

 posterior the anal. Examining this anterior triangle, we 

 find, after removing the integument, that the superficial 

 fascia is divisible into two layers, a superficial, continu- 

 ous with the superficial fascia of the body, and a deep 

 the fascia of Colles, which is triangular in shape and 

 passes behind the transver.sus perinei to be attached to the 

 posterior border or base of the triangular ligament. These 

 two layers of fascia are continuous with the dartos of the 

 scrotum, but laterally, the deeper layer blends with the 

 rami of the pubes and ischium. Beneath this deep layer 

 of the superficial fascia, in the anterior triangle, there is a 

 space, the floor of which is formed by the anterior layer 

 of the triangular ligament, and which contains the bulb of 

 the corpus spongiosum and the corresponding part of the 

 urethra, the ends of Cowper's ducts, the crura of the 

 penis, muscles, viz., the accelerator urinse, erector penis 

 and transversus perinei, the superficial and transverse 

 perineal vessels and the superficial perineal nerves, the 

 artery of the corpus cavernosum and the dorsal artery, 



