The pelvic floor muscles are a group of muscles at the base of the pelvis that support your internal organs, help control bladder and bowel movements, contribute to core stability, and play a vital role in sexual health. Here is a list of the human pelvic floor and perineal muscles: Deep Pelvic Floor Muscles (Pelvic Diaphragm) Levator Ani Group Pubococcygeus Puborectalis Iliococcygeus Coccygeus (Ischiococcygeus) Superficial Perineal Muscles Superficial Transverse Perineal Muscle Bulbospongiosus Ischiocavernosus External Anal Sphincter Deep Transverse Perineal Muscle