Urogenital diaphragm

Older texts have asserted the existence of a urogenital diaphragm, also called the triangular ligament, which was described as a layer of the pelvis that separates the deep perineal sac from the upper pelvis, lying between the inferior fascia of the urogenital diaphragm (perineal membrane) and superior fascia of the urogenital diaphragm.wikipedia
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Pelvis

pelvicpelvic girdlehip
Older texts have asserted the existence of a urogenital diaphragm, also called the triangular ligament, which was described as a layer of the pelvis that separates the deep perineal sac from the upper pelvis, lying between the inferior fascia of the urogenital diaphragm (perineal membrane) and superior fascia of the urogenital diaphragm.
The urogenital diaphragm consists mainly of the deep transverse perineal which arises from the inferior ischial and pubic rami and extends to the urogenital hiatus.

Perineal membrane

inferior fascia of the urogenital diaphragmfibrosainferior
Older texts have asserted the existence of a urogenital diaphragm, also called the triangular ligament, which was described as a layer of the pelvis that separates the deep perineal sac from the upper pelvis, lying between the inferior fascia of the urogenital diaphragm (perineal membrane) and superior fascia of the urogenital diaphragm.
The term "inferior fascia of urogenital diaphragm", used in older texts, is considered equivalent to the perineal membrane.

Deep perineal pouch

Deep perineal spacedeep perineal sac
Older texts have asserted the existence of a urogenital diaphragm, also called the triangular ligament, which was described as a layer of the pelvis that separates the deep perineal sac from the upper pelvis, lying between the inferior fascia of the urogenital diaphragm (perineal membrane) and superior fascia of the urogenital diaphragm.
Older texts have asserted the existence of a "urogenital diaphragm", which was described as a layer of the pelvis that separates the deep perineal sac from the upper pelvis.

Superior fascia of the urogenital diaphragm

superior
Older texts have asserted the existence of a urogenital diaphragm, also called the triangular ligament, which was described as a layer of the pelvis that separates the deep perineal sac from the upper pelvis, lying between the inferior fascia of the urogenital diaphragm (perineal membrane) and superior fascia of the urogenital diaphragm.
If the obturator fascia be traced medially after leaving the Obturator internus muscle, it will be found attached by some of its deeper or anterior fibers to the inner margin of the pubic arch, while its superficial or posterior fibers pass over this attachment to become continuous with the superior fascia of the urogenital diaphragm.

Urethra

male urethraurethralFemale urethra
The urethral diaphragm is an anatomic landmark used in radiologic and urologic classification of urethral injury.
Between the superior and inferior fascia of the urogenital diaphragm, the female urethra is surrounded by the urethral sphincter.

Perineum

perinealperineal bodyanogenital
Specifically, when a retrograde urethrogram demonstrates extension of contrast from the proximal bulbous urethra into the perineum, there is an increase of grading of the injury from a Type 2 to a Type 3 classification.

Terminologia Anatomica

TAanatomicalInternational standard on human anatomic terminology
While it has no official entry in Terminologia Anatomica, the term is still used occasionally to describe the muscular components of the deep perineal pouch.

Radiology

radiologistradiologistsradiological
The urethral diaphragm is an anatomic landmark used in radiologic and urologic classification of urethral injury.

Urology

urologisturologicalurologic
The urethral diaphragm is an anatomic landmark used in radiologic and urologic classification of urethral injury.

Retrograde urethrogram

urethrographyRetrograde cystourethrogramurethrogram
Specifically, when a retrograde urethrogram demonstrates extension of contrast from the proximal bulbous urethra into the perineum, there is an increase of grading of the injury from a Type 2 to a Type 3 classification.

Pelvic floor

pelvic diaphragmpelvic floor musclespelvic muscles
The term "urogenital diaphragm" is often confused with the pelvic diaphragm (pelvic floor), which is a true diaphragm supporting many of the pelvic organs.

Pubic arch

subpubic angleArcus pubispelvic ischial arch

Internal pudendal artery

Dorsal artery of clitorisdeep artery of clitorisinternal pudendal vessels

Thoracic diaphragm

diaphragmdiaphragmatichemidiaphragm
The term diaphragm in anatomy, created by Gerard of Cremona, can refer to other flat structures such as the urogenital diaphragm or pelvic diaphragm, but "the diaphragm" generally refers to the thoracic diaphragm.

External sphincter muscle of male urethra

maleexternal urethral sphincterexternal sphincter muscle
The external sphincter muscle of urethra, also sphincter urethrae membranaceae, sphincter urethrae externus, surrounds the whole length of the membranous urethra, and is enclosed in the fascia of the urogenital diaphragm.

Vagina

birth canalvaginalvaginal opening
The middle third of the vagina involves the urogenital diaphragm.

Posterior scrotal nerves

Posterior scrotalposterior scrotal nerve
They pierce the fascia of the urogenital diaphragm, and run forward along the lateral part of the urethral triangle in company with the posterior scrotal branches of the perineal artery; they are distributed to the skin of the scrotum or labia and communicate with the perineal branch of the posterior femoral cutaneous nerve.

Bulbourethral gland

Cowper's glandBulbo-urethral glandbulbourethral
Bulbourethral glands are located posterior and lateral to the membranous portion of the urethra at the base of the penis, between the two layers of the fascia of the urogenital diaphragm, in the deep perineal pouch.

Dorsal artery of the penis

dorsal arteriesarteriesdorsal artery
The Dorsal Artery of the Penis is a branch of the internal pudendal artery which ascends between the crus penis and the pubic symphysis, and, piercing the inferior fascia of the urogenital diaphragm, passes between the two layers of the suspensory ligament of the penis, and runs forward on the dorsum of the penis to the glans, where it divides into two branches, which supply the glans and prepuce.