You searched for: “electromyography of pelvic floor sphincters
electromyography of pelvic floor sphincter (s) (noun), electromyography of pelvic floor sphincters (pl)
An electrodiagnostic test performed to evaluate the neuromuscular function of the urinary or anal sphincter (circular muscle that constricts a passage or closes a natural opening):

An electromyography of pelvic floor sphincter is done most often in patients with urinary or fecal incontinence.