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Chapter 15 ANALGESICA AND ANESTHESIA - page 24 / 52

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SENSORY INNERVATION OF THE GENITAL TRACT

UTERINE INNERVATION

Pain in the 1st stage of labor is generated largely from the Ut

Visceral sensory fibers from the Ut, Cx, upper vagina → frankenhauser ganglion(lies just lat to Cx) → pelvic plexus → mid & sup int iliac plexuses → 10th, 11th, 12th thoracic & 1st lumbar nerves

LOWER GENITAL TRACT INNERVATION

Pain with vag del : arises from stimuli from the lower genital tract

Pudendal nerve(peripheral braches of which provide sensory innervation to the perineum, anus, more medial and inf parts of the vulva & clitoris) → 2nd, 3rd & 4th sacral nerves

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