Transverse perineal muscles
The superficial transverse perineal muscle (transversus superficialis perinei or Lloyd-Beanie muscle) is a narrow muscular slip, which passes more or less transversely across the perineal space in front of the anus.In some cases, the fibers of the deeper layer of the external anal sphincter cross over in front of the anus and are continued into this muscle.The deep transverse perineal muscle (transversus perinei profundus) lies in the perineum, a part of the pelvic floor.It arises from the inferior rami of the ischium and runs to the median plane, where it interlaces in a tendinous raphe with the other deep transverse perineal muscle of the opposite side.The function of the muscle is fixation of the perineal body (central tendon of perineum), support of the pelvic floor, expulsion of semen in males and last drops of urine in both sexes.