0071509674.pdf

58 Anatomy, Histology, and Cell Biology

Male Testes, crura of penis, bulb of Deep transverse perineal

penis, penile urethra, external urethral sphincter,

superficial transverse bulbourethral glands,

perineal muscles membranous urethra

Female Crura of the clitoris, vestibular Deep transverse perineal muscle,

bulbs, superficial transverse external urethral sphincter,

perineal muscles, greater urethra

vestibular glands

CONTENTS OF THE PERINEAL SPACES ARE GENDER SPECIFIC

Gender Superficial Perineal Space Deep Perineal Space

• The male external urethral sphincteris formed by two muscles: sphinc-
  ter urethra and compressor urethrae muscles, both in the deep perineal
  space. The female external urethral sphincter is formed by 3 muscles:
  sphincter urethra, compressor urethrae, and urethrovaginalis muscles
  •A pudendal blockcan be effected by injecting an anesthetic into the
  vicinity of the pudendal nerve in the pudendal (Alcock’s) canal close to
  the ischial spine.

Erection hypogastric plexus,

pelvic plexus, cavernous

plexus (S2–S4)

Emission L1–L2: lumbar

splanchnic nerves

Ejaculation (some pelvic Pudendal nerve,

splanchnic nerves) S3–S5

PELVIC AUTONOMIC FUNCTION

Function Sympathetic Parasympathetic Somatic

Pelvic viscera

• The female pelvisis less massive, the subpubic angle is greater (almost
  90 °), and the pelvic inlet more ovoid than the male pelvis.


• The obstetric conjugateis the least anteroposterior diameter of the
  pelvic inlet from the sacral promontory to a point a few millimeters
  below the superior margin of the pubic symphysis.