"The paired superficial transverse perineal muscles (TA: musculus transversus superficialis perinei) lie in the perineum and are important for stabilising the perineal body."
"origin: ischial tuberosity"
"insertion: the fibres of each muscle meet in the midline at the perineal body and decussate to intertwine with their contralateral superficial transverse perineal muscle 2,3"
"innervation: perineal nerve, a branch of the pudendal nerve"
"action: aid in the stability of the perineal body"
"action: aid in the stability of the perineal body"