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Female and male superficial perineal muscles (from Wikipedia
The vestibular bulbs correspond to the bulb of the penis. They are two erectile organs situated in the anterior region of the perineum (i.e., bulbo-clitoral region), and they are covered by the bulbocavernosus muscles (Figs. 3 and 4), which are implicated in inferior vaginismus, while the pubovaginal muscle is responsible for superior vaginismus (Fig. 5).