Predictive Utility and Mechanisms of Sacral Evoked Responses in Sacral Neuromodulation

Inclusion Criteria: * Determined by the research team to be fully eligible to receive a sacral neuromodulation implant at a sacral nerve as part of their normal clinical care for overactive bladder (OAB). * Adult (18 or older), capable of providing own informed consent and communicating clearly with research team. * Capable of speaking, reading, and understanding English, as all study questionnaires are standardized assessments only available in English. Exclusion Criteria: * Areflexive or atonic bladder. * Pregnant or planning to become pregnant. If a woman of child-bearing potential wishes to participate in this study, they will be pre-screened with a test to detect pregnancy. * Diagnosed neurogenic bladder, sacral nerve damage, lower motor dysfunction, or other conditions that would affect the neural circuits involved in micturition.