<prompt> An obstetrician performs a median episiotomy on a woman before paurition to prevent uncontrolled tearing. If the perineal body is damaged, the function of which of the following muscles might be impaired?Ischiocavernosus and sphincter urethraeDeep transverse perineal and obturator internusBulbospongiosus and superficial transverse perinealExternal anal sphincter and sphincter urethrae  <response>: The perineal body central tendon of the perineum is a fibromuscular node at the center of the perineum. It provides attachment for the bulbospongiosus, the superficial and deep transverse perineal muscles, and the sphincter ani externus muscles. Other muscles ischiocavernosus, sphincter urethrae, and obturator internus are not attached to the perineal body. 