Innervation of female reproductive systm.pptx

The ovarian plexus contains both sympathetic and parasympathetic nerves.
Sympathetic nerves T10 and T11 are afferent for pain as well as efferent or vasomotor.
Parasympathetic nerves S2 - S4 are vasodilator

1. Innervation of female reproductive system By- Suryansh Agrawal MD-VIII

2. Innervation of internal genital organ Fallopian tube

3. Nerve supply of ovary The ovarian plexus contains both sympathetic and parasympathetic nerves. Sympathetic nerves T10 and T11 are afferent for pain as well as efferent or vasomotor. Parasympathetic nerves S2 - S4 are vasodilator .

4. Nerve supply of uterine tubes The  sympathetic nerve  from T10- L2 are derived from hypogastric plexus. Contain both visceral afferent and efferent fibers. Efferent fibers are vasomotor and perhaps stimulate tubal peristalsis.

5. Nerve supply of uterine tubes P arasympathetic nerves are derived from the vagus  for lateral half of the tube . Pelvic splanchnic nerves from S2- S4 segment of spinal cord for the medial half. Splanchnic nerve inhibit peristalsis and produce vasodilation.

6. Nerve supply of Uterus Uterine contraction and vasoconstriction are produced by sympathetic nerves from T12 and L1 segment of spinal cord. Parasympathetic nerves from S2 - S4 produce uterine inhibition and vasodilation.

7. Nerve supply of Vagina The lower one-third of the vagina is pain sensitive and is supplied by the pudendal nerve through the inferior rectal and posterior labial branches of the perineal nerve. The upper two-thirds of the vagina are pain insensitive and are supplied by sympathetic L1, 2 and parasympathetic segments S2 to S4. Nerves are derived from the inferior hypogastric and uterovaginal plexuses.

8. Nerve supply of external genital organ

9. Cutaneous innervation Dorsal nerve of clitoris: It supplies the skin of the clitoris .

10. Cutaneous innervation Ilioinguinal nerve and genital branch of the genitofemoral nerve: These supply the skin of the anterior one-third of the labium majus. Perineal branch of posterior cutaneous nerve of thigh: It supplies the skin of the lateral part of the urogenital region and the lateral part of the posterior two-thirds of the labium majus. Posterior labial nerves: These supply the skin of the medial part of the urogenital region including the labium minus in females and the medial part of the posterior two-thirds of the labium majus.

11. Innervation of Urethra Somatic fibres from same segments (S2–4) reach the striated muscles through pelvic splanchnic nerves that do not synapse in vesical plexus.  Sensory fibres in pelvic splanchnic nerves reach to 2nd–4th sacral segments of spinal cord.  Postganglionic sympathetic fibres arise from plexus around the vaginal arteries.

12. Innervation of Urethra Parasympathetic preganglionic fibres from 2nd–4th sacral segments of spinal cord.  These run through pelvic splanchnic nerves and synapse in vesical venous plexus. Postganglionic fibres reach smooth muscles.  The mucous membrane of urethra is supplied by the perineal branch of the pudendal nerve.

13. Bibliography BD Chaurasia’s Human Anatomy Volume 2 eight edition Cpt-28,30& 31 Page no 409- 445