Bulbospongiosus muscle
Updates to Article Attributes
Body
was changed:
The bulbospongiosus muscle is found in the superficial perineal pouch which covers the bulb of the penis in males and the bulb of the vestibule in females.
Summary
- origin: median raphe and perineal body
- insertion: dorsum of penis/clitoris, perineal membrane
- innervation: pudendal nerve
- arterial supply: perineal artery
Gross anatomy
In men, the bulbospongiosus muscle arises from both the medial raphe and perineal body. Some of these fibres travel laterally to attach to the perineal membrane. However, the majority of fibres act to wrap around the bulb and the corpus spongiosum to attach to the dorsal side of the penis.
In females, the bulbospongiosus muscle arises from the perineal body but are distinctly separated on each side. Fibres then travel to cover the vestibular bulbs and greater vestibular glands.
Function
The bulbospongiosus muscle acts to expel remaining urine from the urethra after the bladder has completed its emptying. In males it also aids in the final stages of erection by compressing the veins within the bulb of the penis to maintain tumescence.
In females it constricts the vaginal orifice and aids in expression of the greater vestibular glands. It also contributes to erection of the clitoris in a similar manner to penile erection described above.
-<p>The <strong>bulbospongiosus muscle</strong> is found in the <a href="/articles/superficial-perineal-pouch">superficial perineal pouch</a> which covers the bulb of the <a title="Penis" href="/articles/penis">penis</a> in males and the <a title="Bulbs of the vestibule" href="/articles/bulbs-of-the-vestibule-2">bulb of the vestibule</a> in females.</p><h4>Summary</h4><ul>- +<p>The <strong>bulbospongiosus muscle</strong> is found in the <a href="/articles/superficial-perineal-pouch">superficial perineal pouch</a> which covers the bulb of the <a href="/articles/penis">penis</a> in males and the <a href="/articles/bulbs-of-the-vestibule-2">bulb of the vestibule</a> in females.</p><h4>Summary</h4><ul>
-<strong>origin</strong>: <a title="median raphe" href="/articles/median-raphe">median raphe</a> and <a title="perineal body" href="/articles/perineal-body">perineal body</a>- +<strong>origin</strong>: <a href="/articles/median-raphe">median raphe</a> and <a href="/articles/perineal-body">perineal body</a>
-<strong>insertion</strong>: dorsum of <a href="/articles/penis">penis</a>/<a title="Clitoris" href="/articles/clitoris">clitoris</a>, <a href="/articles/perineal-membrane">perineal membrane</a>- +<strong>insertion</strong>: dorsum of <a href="/articles/penis">penis</a>/<a href="/articles/clitoris">clitoris</a>, <a href="/articles/perineal-membrane">perineal membrane</a>
-<strong>arterial supply</strong>: <a title="perineal artery" href="/articles/perineal-artery">perineal artery</a> </li>-</ul><h4>Gross anatomy</h4><p>In men, the bulbospongiosus muscle arises from both the medial raphe and perineal body. Some of these fibres travel laterally to attach to the perineal membrane. However, the majority of fibres act to wrap around the bulb and the corpus spongiosum to attach to the dorsal side of the penis. </p><p>In females, the bulbospongiosus muscle arises from the perineal body but are distinctly separated on each side. Fibres then travel to cover the vestibular bulbs and <a title="Greater vestibular glands" href="/articles/bartholin-glands">greater vestibular glands</a>.</p><h5>Function</h5><p>The bulbospongiosus muscle acts to expel remaining urine from the <a href="/articles/urethra">urethra</a> after the <a href="/articles/urinary-bladder">bladder</a> has completed its emptying. In males it also aids in the final stages of erection by compressing the veins within the bulb of the penis to maintain tumescence.</p><p>In females it constricts the <a title="Vaginal orifice" href="/articles/vaginal-opening">vaginal orifice</a> and aids in expression of the greater vestibular glands. It also contributes to erection of the <a title="Clitoris" href="/articles/clitoris">clitoris</a> in a similar manner to penile erection described above.</p>- +<strong>arterial supply</strong>: <a href="/articles/perineal-artery">perineal artery</a> </li>
- +</ul><h4>Gross anatomy</h4><p>In men, the bulbospongiosus muscle arises from both the medial raphe and perineal body. Some of these fibres travel laterally to attach to the perineal membrane. However, the majority of fibres act to wrap around the bulb and the corpus spongiosum to attach to the dorsal side of the penis. </p><p>In females, the bulbospongiosus muscle arises from the perineal body but are distinctly separated on each side. Fibres then travel to cover the vestibular bulbs and <a href="/articles/bartholin-glands">greater vestibular glands</a>.</p><h5>Function</h5><p>The bulbospongiosus muscle acts to expel remaining urine from the <a href="/articles/urethra">urethra</a> after the <a href="/articles/urinary-bladder">bladder</a> has completed its emptying. In males it also aids in the final stages of erection by compressing the veins within the bulb of the penis to maintain tumescence.</p><p>In females it constricts the <a href="/articles/vaginal-opening">vaginal orifice</a> and aids in expression of the greater vestibular glands. It also contributes to erection of the <a href="/articles/clitoris">clitoris</a> in a similar manner to penile erection described above.</p>
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