NBME 19 pelvic nerves (NBME Answers)

+3
submitted by ∗brasel(17),

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1). nghmoseti bgnckloi ofultow ;g(.e. B)HP

.)2 mpdriaei itaoonrctnc of ealddrb .(;.eg dgadaem )envers

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solidshake I agree answer is the parasympathetic Pelvic Splanchnic nerve, but don't forget there are 2 mechanisms that are affected when it's damaged: 1. Impaired involuntary contraction of bladder and also 2. Impaired involuntary relaxation of the internal urethral sphincter. Pelvic Splanchnic nerve facilitates both of those + voluntary somatic relaxation of external urethral sphincter via pudendal nerve allows you to pee +

chaosawaits @solidshake I may be just unable to search properly, but I found the internal urethral sphincter to be innervated by the sympathetic fibers from T10-L2 through the inferior hypogastric plexus (source: Wikipedia) Urination occurs by preganglionic inhibition of the sympathetic fibers via descending reticulospinal tract. Fact check appreciated. +2