Innervation of Perineum and Genitalia Quiz
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Questions and Answers

Which branch of the pudendal artery supplies the glans of the clitoris or penis?

  • Inferior pudendal artery
  • Perineal artery
  • Inferior rectal artery
  • Internal pudendal artery (correct)

Which vein drains blood from the corpora cavernosa and glans of the clitoris or penis?

  • Deep dorsal (cavernous) clitoral/penile vein (correct)
  • Internal pudendal vein
  • Inferior rectal vein
  • Prostatic (uterovaginal) venous plexus

Which branch of the pudendal nerve supplies sensory innervation to the skin and glans of the clitoris or penis?

  • Posterior labial/scrotal nerve
  • Inferior rectal nerve
  • Dorsal nerve of the clitoris or penis (correct)
  • Perineal nerve

Which branch of the pudendal nerve supplies motor innervation to the ischiocavernosus and bulbospongiosus muscles?

<p>Perineal nerve (A)</p> Signup and view all the answers

Which vein drains the perineum and then joins the prostatic (uterovaginal) venous plexus?

<p>Internal pudendal vein (D)</p> Signup and view all the answers

Which of the following nerves is responsible for the innervation of the external anal sphincter?

<p>Pudendal nerve (A)</p> Signup and view all the answers

The pudendal artery supplies blood to which of the following structures?

<p>All of the above (D)</p> Signup and view all the answers

What is the primary function of the pudendal veins?

<p>Drainage of the corpora cavernosa (A)</p> Signup and view all the answers

Which nerve is responsible for the innervation of the cavernous bodies of the clitoris or penis?

<p>Cavernous nerve (C)</p> Signup and view all the answers

Which nerve is responsible for the innervation of the anterior perineum?

<p>Ilio-inguinal nerve (B)</p> Signup and view all the answers

Which of the following nerves does NOT provide sensory innervation to the labia majora and scrotum?

<p>Femoral nerve (A)</p> Signup and view all the answers

Which of the following nerves is responsible for the anocutaneous (anal 'wink') reflex?

<p>Inferior rectal nerve (branch of the pudendal nerve) (D)</p> Signup and view all the answers

Which of the following statements about the vasculature of the perineum is NOT true?

<p>The pudendal artery is the primary arterial supply to the clitoris or penis. (D)</p> Signup and view all the answers

Which of the following nerves innervates the ischiocavernosus and bulbospongiosus muscles?

<p>Perineal nerve (branch of the pudendal nerve) (B)</p> Signup and view all the answers

Which of the following statements about the dermatomes of the perineum is true?

<p>The dermatomes of the perineum are primarily provided by S3-S5 nerves (mostly from the pudendal nerve). (D)</p> Signup and view all the answers

Which nerve supplies the inferior rectal nerve branch in the anal triangle?

<p>Pudendal nerve (C)</p> Signup and view all the answers

What blood vessels are branches of the internal pudendal vessels in the anal triangle?

<p>Inferior rectal blood vessels (C)</p> Signup and view all the answers

In males, what structures form the root of the scrotum in the urogenital triangle of the perineum?

<p>Bulb of penis (C)</p> Signup and view all the answers

Which fascia attaches to the pubic arch and ischiopubic ramus in the perineum?

<p>Perineal membrane (A)</p> Signup and view all the answers

What innervates the external anal sphincter in the anal triangle?

<p>Pudendal nerve (D)</p> Signup and view all the answers

Which vein drains the perineum and then joins the prostatic (uterovaginal) venous plexus?

<p>Perineal vein (B)</p> Signup and view all the answers

Which branch of the pudendal artery supplies blood to the glans of the clitoris or penis?

<p>Dorsal artery of the clitoris/penis (C)</p> Signup and view all the answers

Which nerve is responsible for the innervation of the cavernous bodies of the clitoris or penis?

<p>Cavernous nerves (B)</p> Signup and view all the answers

Which branch of the pudendal nerve supplies sensory innervation to the skin and glans of the clitoris or penis?

<p>Dorsal nerve of the clitoris/penis (A)</p> Signup and view all the answers

Which nerve is responsible for the innervation of the anterior perineum?

<p>Pudendal nerve (D)</p> Signup and view all the answers

During physical examination, a herniated mass causing an 'impulse' on the examiner's finger is most likely indicative of which type of hernia?

<p>Indirect inguinal hernia (D)</p> Signup and view all the answers

Which artery supplies the clitoris and ends as the posterior labial artery in females?

<p>Posterior labial artery (B)</p> Signup and view all the answers

Which type of hernia may pass through the superficial ring but not the deep ring of the inguinal canal?

<p>Direct inguinal hernia (C)</p> Signup and view all the answers

Which artery supplies the inferior rectum as a main branch of the internal pudendal artery?

<p>Inferior rectal artery (B)</p> Signup and view all the answers

Which vessel drains blood from the corpora cavernosa and glans of the clitoris or penis?

<p>Pudendal veins (D)</p> Signup and view all the answers

Which branch of the pudendal artery supplies the majority of the blood flow to the glans of the clitoris or penis?

<p>The dorsal artery of the clitoris or penis (B)</p> Signup and view all the answers

Which vein is responsible for draining blood from the corpora cavernosa and glans of the clitoris or penis?

<p>The dorsal vein of the clitoris or penis (D)</p> Signup and view all the answers

Which branch of the pudendal nerve is responsible for the sensory innervation of the skin and glans of the clitoris or penis?

<p>The dorsal nerve of the clitoris or penis (C)</p> Signup and view all the answers

Which vein drains the perineum and then joins the prostatic (uterovaginal) venous plexus?

<p>The internal pudendal vein (A)</p> Signup and view all the answers

Which branch of the pudendal nerve supplies motor innervation to the ischiocavernosus and bulbospongiosus muscles?

<p>The perineal nerve (D)</p> Signup and view all the answers

Which artery supplies the majority of the blood flow to the skin and muscles of the anterior perineum?

<p>The perineal artery (D)</p> Signup and view all the answers

Which branch of the pudendal nerve is responsible for the innervation of the external anal sphincter?

<p>The inferior rectal nerve (D)</p> Signup and view all the answers

What is the primary function of the pudendal veins?

<p>To drain the blood from the perineum and join the prostatic (uterovaginal) venous plexus (B)</p> Signup and view all the answers

Which branch of the pudendal artery supplies blood to the skin and muscles of the posterior perineum, including the external anal sphincter?

<p>The inferior rectal artery (B)</p> Signup and view all the answers

Which nerve is responsible for the innervation of the cavernous bodies of the clitoris or penis?

<p>The cavernous nerve (D)</p> Signup and view all the answers

What muscle in males covers the crus of the penis?

<p>Ischiocavernosus (A)</p> Signup and view all the answers

Which muscle covers the bulb of the vaginal vestibule in females?

<p>Bulbospongiosus (C)</p> Signup and view all the answers

In females, what does the perineal membrane separate?

<p>Superficial and deep perineal pouches (A)</p> Signup and view all the answers

Which structure is sometimes referred to clinically as the 'perineum'?

<p>Perineal body (B)</p> Signup and view all the answers

What does the superficial perineal pouch contain in males and females?

<p>Roots and bulbs of clitoris/penis, glands, and perineal skin (C)</p> Signup and view all the answers

Which nerve is responsible for providing sensory innervation to the labia majora in the female perineum?

<p>Pudendal nerve (B)</p> Signup and view all the answers

Which nerve is primarily responsible for the sensory innervation of the scrotum in the male perineum?

<p>Genitofemoral nerve (B)</p> Signup and view all the answers

Which dermatome is responsible for the sensory innervation of the anterior perineum, including the labia majora and scrotum?

<p>T12-L1 (C)</p> Signup and view all the answers

Which nerve block is commonly used for pain relief during childbirth, providing anesthesia to the perineal region?

<p>Pudendal nerve block (A)</p> Signup and view all the answers

Which anatomical structure in the perineum forms the boundary between the urogenital triangle and the anal triangle?

<p>Perineal body (C)</p> Signup and view all the answers

Which of the following nerves is responsible for the sensory innervation of the labia majora and scrotum?

<p>Genitofemoral nerve (B)</p> Signup and view all the answers

Which dermatome corresponds to the perineal region?

<p>S2-S4 (D)</p> Signup and view all the answers

Which nerve block would be most appropriate for providing local anesthesia during childbirth?

<p>Pudendal nerve block (D)</p> Signup and view all the answers

Which of the following structures is part of the urogenital triangle of the perineum in males?

<p>Root of the scrotum (D)</p> Signup and view all the answers

Which of the following statements about the perineal membrane is true?

<p>It anchors the roots of the external genitalia (D)</p> Signup and view all the answers

Which nerve is primarily responsible for providing sensory innervation to the posterior aspect of the scrotum?

<p>Pudendal nerve (C)</p> Signup and view all the answers

The dermatomes of the perineum are primarily innervated by which spinal nerves?

<p>S3-S5 nerves (D)</p> Signup and view all the answers

Which nerve is responsible for the anocutaneous (anal 'wink') reflex?

<p>Inferior rectal nerve (C)</p> Signup and view all the answers

Which nerve is responsible for the sensory innervation of the anterior aspect of the labia majora?

<p>Ilio-inguinal nerve (A)</p> Signup and view all the answers

Which nerve is responsible for the motor innervation of the ischiocavernosus and bulbospongiosus muscles in the perineum?

<p>Pudendal nerve (D)</p> Signup and view all the answers

What is the innervation of the labia majora and labia minora?

<p>Vulvar branch of the pudendal nerve (D)</p> Signup and view all the answers

Which nerve provides sensory innervation to the scrotum in males?

<p>Ilioinguinal nerve (A)</p> Signup and view all the answers

Which dermatome of the perineum is primarily responsible for sensation in the external genitalia?

<p>S3 (B)</p> Signup and view all the answers

Local anesthesia for childbirth in the perineal region would most likely involve blocking which nerve?

<p>Pudendal nerve (C)</p> Signup and view all the answers

Which structure lies superior to the perineal membrane and inferior to the pelvic diaphragm?

<p>Deep perineal pouch (A)</p> Signup and view all the answers

Which nerve provides sensory innervation to the labia majora and scrotum?

<p>Pudendal nerve (A)</p> Signup and view all the answers

Which dermatomes supply sensory innervation to the perineum?

<p>S2-S4 (A)</p> Signup and view all the answers

Which nerve block would be most appropriate for providing local anesthesia during childbirth?

<p>Spinal anesthesia (C)</p> Signup and view all the answers

Which artery supplies the majority of the blood flow to the glans of the clitoris or penis?

<p>Deep (cavernous) artery of the clitoris/penis (C)</p> Signup and view all the answers

Which of the following structures is NOT a component of the perineal membrane?

<p>Bulbospongiosus muscle (D)</p> Signup and view all the answers

Which of the following nerves provides sensory innervation to the posterior labia majora?

<p>Posterior labial nerve (B)</p> Signup and view all the answers

Which nerve is responsible for the motor innervation of the bulbospongiosus muscle in males?

<p>Perineal nerve (D)</p> Signup and view all the answers

Which dermatome primarily supplies sensory innervation to the scrotum?

<p>S3 (C)</p> Signup and view all the answers

Which of the following techniques would be most appropriate for providing local anesthesia during childbirth?

<p>Epidural anesthesia (C)</p> Signup and view all the answers

Which muscle in males is responsible for the erection of the penis?

<p>Ischiocavernosus (C)</p> Signup and view all the answers

Which of the following structures is located within the superficial perineal pouch in females?

<p>Bulb of the vestibule (A)</p> Signup and view all the answers

Which nerve is responsible for the innervation of the external anal sphincter?

<p>Inferior rectal nerve (C)</p> Signup and view all the answers

Which of the following muscles is innervated by the perineal nerve?

<p>Ischiocavernosus (A)</p> Signup and view all the answers

Which artery supplies blood to the glans of the clitoris or penis?

<p>Deep artery of the penis/clitoris (D)</p> Signup and view all the answers

Which of the following structures is located within the deep perineal pouch?

<p>Ischiocavernosus muscle (B)</p> Signup and view all the answers

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