How do sympathetic nerves facilitate urine storage?

Updated: Dec 24, 2020
  • Author: Bradley C Gill, MD, MS; Chief Editor: Edward David Kim, MD, FACS  more...
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Sympathetic nerves also facilitate urine storage in the following ways:

  • Sympathetic nerves inhibit the parasympathetic nerves from triggering bladder contractions.

  • Sympathetic nerves directly cause relaxation and expansion of the detrusor muscle.

  • Sympathetic nerves close the bladder neck by constricting the internal urethral sphincter. This sympathetic input to the lower urinary tract is constantly active during bladder filling.

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