Urogenital Diaphragm

Dr. Nazim Nasir ( jr1) Department of Anatomy JNMC AMU Aligarh.

Layer of the pelvis that separates the deep perineal sac from the upper pelvis. Lying between the inferior fascia of the urogenital diaphragm and superior fascia of the urogenital diaphragm. Constituents Deep perineal muscles- sphincter urethrae & deep transverse perinei. Sup. & inf. Fascia of UGD.

Anterior - pubic symphysis (PS) Posterior - coccyx (C) Lateral - ischial tuberosities (IT) Anterolateral - ischiopubic ramus (IPR) Posterolateral - sacrotuberous ligament

Dorsal nerve of penis Ilioinguinal n. and genital br. of genitofemoral n. Perineal branch of post. Cut. N. of thigh Post.scrotal(labial) n.

Fascia is firmly attached to the IPR along the side of the UG triangle and to the posterior free margin of the urogenital diaphragm.

Root of penis Muscles – ischiocavernosus, bulbospongiosus, sup. trans. Perineii Perineal body Br. of perineal nerve Long perineal n. Br. of perineal A. Duct of B-U gland

Superficial- Colle’s fascia Deep- Perineal membrane On either sideIschiopubic rami Ant- Open and continues with the spaces of scrotum and ant. Abd. Wall.

Thick triangular sheet of fascia lying across pubic arch. Base is continuousAbove-sup. Fascia of UGD Below- Colle’s fascia Midline- Perineal body On each side- IPR

Urethra, 1 inch below the pubic symphysis Ducts of bulbourethral glands, close to urethra. A. and N. to bulb of penis. Urethral A. Deep A. of penis. Dorsal A. of penis

b/w sup. & inf. Fascia of UGD. Contents : Deep transverse perineus muscle Urethral sphincter Bulbo-urethral gland (Cowper's gland) Terminal branches of the internal pudendal artery to the bulb of the penis as well as the deep artery of the penis.

After Colles' fascia is removed, identify the structures in the superficial perineal space ischiocavernosus muscle overlying the crus of the clitoris bulbospongiosus muscle overlying the bulb of the vestibule perineal body (central tendon) urethral opening vaginal opening

Urethra Vagina A. and N. to bulb of the vestibule Deep A. of clitoris Dorsal A. of clitoris Post. labial N.s and vessels Br.s of perineal nerve.

b/w sup. & inf. Fascia of UGD. CONTENTS: Urethra with sphincter Dorsal nerve of clitoris Muscular br. Of pudendal n. crus of the clitoris bulb of the

Pyramidal fibromuscular mass in the midline of the perineum at the junction between the urogenital triangle and the anal triangle. In males, it is found between the bulb of penis and the anus. In females, is found between the vagina and anus.

External anal sphincter. Bulbospongiosus. Superficial transverse perineal muscle. Anterior fibers of the levator ani. Fibers from external urinary sphincter. Deep transverse perineal muscle.

skin fatty superficial fascia (Camper's layer) membranous fascia (Scarpa's layer or Colles' fascia in perineum) superficial perineal space inferior fascia of urogenital diaphragm deep transverse perineus muscle superior fascia of urogenital diaphragm anterior extension of ischiorectal fossa inferior fascia of levator ani levator ani superior fascia of levator ani pelvic fascia peritoneum pelvic cavity

Prof. NAFIS AHMAD FARUQI & Prof. AIJAZ AHMED KHAN, Manual of Practical Anatomy VOLUME II (Thorax and Abdomen) http://en.wikipedia.org/wiki/Deep_perineal_pouch http://download.videohelp.com/vitualis/med/urogenital_diaphragm_is http://www.innerbody.com/image_dige04/musc34.html http://images.google.co.in/images?hl=en&q=UROGENITAL+DIAPHRA http://www.answers.com/topic/urogenital-diaphragm http://medical-dictionary.thefreedictionary.com/urogenital+diaphragm Snell’s clinical anatomy

Thanks to all