Anatomy of the Perineum

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Where is the perineum located?

Above the umbilicus

Behind the knee joint

Between the scapulae

Anterior to the sacrum and coccyx (correct)

What divides the perineum into the urogenital triangle and anal triangle?

Line joining the iliac crests

Line joining the patellae

Line joining the scapulae

Line joining the two ischial tuberosities (correct)

What is located at the center of the perineum?

Pubic symphysis

Mons pubis

Perineal body (correct)

Ischial tuberosity

Which structure forms the deep boundaries of the perineum?

Sacrotuberous ligament Signup and view all the answers

What is the characteristic appearance of the confluence of the three taeniae in the anal triangle?

Trefoil appearance Signup and view all the answers

Which region lies between levator ani and the inner aspects of the thighs?

Perineal region Signup and view all the answers

What structures are found in the anal triangle?

Anal canal and ischioanal fossa Signup and view all the answers

What is the primary function of the hemorrhoidal venous plexus?

To supply blood to internal hemorrhoids Signup and view all the answers

Where is the perineal body located?

Between the superficial and deep perineal pouches Signup and view all the answers

Which fascial layer in the perineum is continuous with Scarpa's fascia of the abdomen?

Colle’s fascia Signup and view all the answers

Why are abscesses in the perianal space considered more painful than those in the ischioanal space?

Because fat in the perianal space is more tightly loculated Signup and view all the answers

What can result from the rupture of perianal abscesses?

Formation of fistulae between skin and anal canal Signup and view all the answers

Which nerve supplies the perineum and is a branch of the sacral plexus?

Pudendal nerve Signup and view all the answers

Which spinal nerves contribute to the pudendal nerve?

S1-S3 Signup and view all the answers

Where do most of the perineum lymphatics drain?

Superficial inguinal nodes Signup and view all the answers

Which structure drains into deep inguinal nodes?

Glans penis/clitoris Signup and view all the answers

Which region follows parasympathetic innervation retrograde to thoracolumbar spinal ganglia?

Uterus Signup and view all the answers

What nerve supplies the sympathetic innervation for visceral afferent pain fibers from the subperitoneal uterine cervix and vagina?

Pelvic splanchnic nerves Signup and view all the answers

Anatomy of the Perineum

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Questions and Answers

Where is the perineum located?

What divides the perineum into the urogenital triangle and anal triangle?

What is located at the center of the perineum?

Which structure forms the deep boundaries of the perineum?

What is the characteristic appearance of the confluence of the three taeniae in the anal triangle?

Which region lies between levator ani and the inner aspects of the thighs?

What structures are found in the anal triangle?

What is the primary function of the hemorrhoidal venous plexus?

Where is the perineal body located?

Which fascial layer in the perineum is continuous with Scarpa's fascia of the abdomen?

Why are abscesses in the perianal space considered more painful than those in the ischioanal space?

What can result from the rupture of perianal abscesses?

Which nerve supplies the perineum and is a branch of the sacral plexus?

Which spinal nerves contribute to the pudendal nerve?

Where do most of the perineum lymphatics drain?

Which structure drains into deep inguinal nodes?

Which region follows parasympathetic innervation retrograde to thoracolumbar spinal ganglia?

What nerve supplies the sympathetic innervation for visceral afferent pain fibers from the subperitoneal uterine cervix and vagina?

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