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M1 – Anatomy

Perineum 2: Urogenital Triangle

Dr. Krieg

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Attachments:

to perinealmembrane

to ischiopubicramus

to fascia lata

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(Perineal Membrane)

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Perineal Membrane

Ischiopubic Rami

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Buck’s fascia(deep fascia of penis)

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Bulbospongiosus m.

Superficial TransversePerineus m.

Ischiocavernosus m.

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Perineal branch of pudendal nerve

Posterior Scrotal nerves

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Inferior Side of Deep Perineal Pouch

Inferior Fascia of theUrogenital Diaphragm

Ischiopubic Rami

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Membranous Urethra

Sphincter urethrae m.

Bulbourethral gland

Deep TransversePerineus m.

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PerinealMembrane

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Dorsal artery of penis

Deep artery of penis

Artery to the Bulb

Dorsal nerve of penis

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Dorsal nerve of penisDorsal artery of penis

Deep dorsal vein of penis

Buck’s fascia

Deep artery of penis

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Crura Corpus Cavernosum

Corpus Spongiosum:Bulb of penisGlans of penis

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Prostatic urethra

Spongy urethra

Membranous urethra

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Rupture between prostatic and membranous urethrae

Spread of urine Inside pelvis

Partial tear

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Urine confined to the structure of the penis

Urine spreads into the Superficial perineal pouch

-Deep fascia intact:(urethra ruptured in shaft of penis)

-Deep fascia ruptured: (urethra ruptured in bulb of penis)

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Buck’s fascia(deep fascia of penis)

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Superficial External Pudendal Vein

Superficial Dorsal Vein

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To prostatic venousPlexus (inside pelvis)

Deep dorsal vein

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Superficial fascia

Deep dorsal vein

Dorsal artery

Deep (Buck’s) fascia

Dorsal nerve

Superficial dorsal vein

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Vestibule

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Labium majus

Vestibule

Urethra

Vagina

Labium minus

Prepuce

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Glans of clitoris

Bulbospongiosus m.overlying the vestibularbulb & greater vestibular gland

Ischiocavernosus m.overlying the crus

Superficial transverseperineus m.

Perineal Body(central tendon)

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Bulb of the Vestibule

Greater Vestibular Gland

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Perineal branches ofpudendal nerve andinternal pudendal a.

Posterior labial branches

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Nerve branches to the perineum:

from Pudendalnerve

from Posteriorfemoral cutaneous

nerve

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Perineal membrane

Deep artery of clitoris

Dorsal artery of clitoris

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Dorsal nerve of clitoris

Internal pudendal a.

Artery to the bulb of the vestibule

Sphincter urethrae m.

Sphincter vaginae m.

Deep transverse perineus m. 36

PudendalBlock

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Episiotomy