bulbospongiosus (muscle)

[TA]

perineal muscle; in the male: origin, the perineal membrane fascia on the dorsum of the bulb of the penis; insertion, central tendon of the perineum and the median raphe on the free surface of the bulb; action, voluntarily constricts bulbous urethra when attempting to expel last drops after urination, or spasmodically with, and after, ejaculation to expel semen. In the female: origin, the dorsum of the clitoris, the corpus cavernosum, and the perineal membrane; insertion, central tendon of the perineum; action, acts as a weak sphincter of the vagina; when developed, is a part of "cross-member musculature" of pelvic floor that resists prolapse of pelvic viscera; surrounds and compresses greater vestibular gland, especially during erection of bulb of vestibule, expressing secretion. Nerve supply, pudendal (deep perineal branch).

Synonym(s): musculus bulbospongiosus [TA], bulbocavernosus muscle, musculus bulbocavernosus, musculus ejaculator seminis, musculus sphincter vaginae, sphincter vaginae

Farlex Partner Medical Dictionary © Farlex 2012

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References in periodicals archive

Sensitive periods for the androgen-induced masculinization of the rat spinal nucleus of the bulbocavernosus. J.

Postnatal development of the gastrin-releasing peptide system in the lumbosacral spinal cord controlling male reproductive function in rats

Variance of patients in terms of etiological factor, neurological level, lesion severity, presence of TPS and BCR, frequency of storage, and emptying dysfunction and type of detrusor n = 59 Etiological factor (Traumatic/ 54/5 Non-traumatic) Neurological level (Cervical/Thoracic/ 13/30/16 Lumbosacral) Lesion severity (Complete/Incomplete) 34/25 TPS (Present/Absent) 20/39 BCR (Present/Absent) 50/9 Frequency of storage dysfunction 35 Frequency of emptying dysfunction 56 Type of detrusor (Overactive/ 48/11 Acontractile-underactive) TPS: Toe position sense; BCR: bulbocavernosus reflex Table 2.

Relationship of bladder function with toe position sense, neurological level, lesion severity, and bulbocavernosus reflex in patients with spinal cord injury

* Focused neurological examination for S2, 3, 4 reflex arc (anal tone, peri-anal sensation, bulbocavernosus reflex)

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For example, some groups defined the end of spinal shock as the first few days postinjury when recovery of initial reflexes, such as the bulbocavernosus reflex, had occurred, other groups as 2 weeks postinjury when recovery of the deep tendon reflexes had occurred, while still other groups defined the end of spinal shock as ~2 months postinjury when recovery of the bladder reflex had occurred.

Assessment of autonomic dysfunction following spinal cord injury: rationale for additions to International Standards for Neurological Assessment

Table 1 CT Signs of Urethral Injuries in Patients With Pelvic Fractures (46) Patients Patients With Without Associated Associated Urethral Urethral Injuries Injuries CT Signs (n = 17) (n = 30) Distortion or concealment of urogenital diaphragm fat plane 15 (88) 1 (3) Hematoma of ischiocavernosus 15 (88) 5 (17) Distortion or concealment of prostatic contour 10 (59) 2 (7) Distortion or concealment of bulbocavernosus 8 (47) 3 (10) Hematoma of obturator internus 9 (53) 4 (13) Note: Numbers in parentheses are percentages.

Blunt pelvic trauma

The physical exam should include mental and functional status, genital and rectal exam, and a neurologic exam of sacral root integrity (e.g., anal wink, bulbocavernosus reflex).

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The physical exam should include mental and functional status, a genital and rectal exam, and a neurologic exam of sacral root integrity (such as anal wink or bulbocavernosus reflex).

Try behavioral Tx first for urinary incontinence

Breedlove (1997a) found seasonal variation in the size of the spinal nucleus of the bulbocavernosus (SNB) a region of the brain which enervates the penis.

Androgens, Ageing, Behavior and Cognition: Complex interactions and novel areas of inquiry

The clinician should test sensation in the genital and perineal area, and should check the bulbocavernosus reflex (Alberson et al., 2012).

Erectile dysfunction in the older adult male

The fascia of the bulbocavernosus and superficial transveralis muscles might need to be reapproximated with individual sutures.

Stop performing median episiotomy! Start using a mediolateral incision when episiotomy is indicated

The dorsal artery of the penis was observed to pass coudally through the body of the penis in a groove formed by the right and left bulbocavernosus muscle after the leaving arteria pudenda interna, and later running along the dorsum penis, each side of the retractor penis muscle.

Anatomical study of copulatory organ in male rabbit