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contraction of the walls of the bladder and relaxation of the trigone and urethral sphincter in response to a rise in pressure within the bladder; the reflex can be voluntarily inhibited and the inhibition readily abolished to control micturition.
vesical reflex(1) Micturition reflex, see there.
(2) Bladder reflex, see there.
An inclination to urinate caused by moderate bladder distention.
See also: reflex