33. GA - Anterior Abdominal Wall & Inguinal Region
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Questions and Answers

What role does the rectus sheath play in the anatomy of the anterior abdominal wall?

  • Maintains the position of the abdominal organs
  • Connects the internal and external oblique muscles
  • Acts as a protective covering for abdominal muscles (correct)
  • Provides a passage for blood vessels only
  • Which muscle of the anterior abdominal wall does NOT contribute to the formation of the inguinal canal?

  • External Abdominal Oblique
  • Internal Abdominal Oblique
  • Rectus Abdominis (correct)
  • Transversus Abdominis
  • Which fascia is located deep to the muscular layer of the anterior abdominal wall?

  • Scarpa's fascia
  • Transversalis fascia (correct)
  • Camper's fascia
  • Peritoneum
  • What is the primary function of the cutaneous nerves of the anterior abdominal wall?

    <p>Provide sensory innervation to the skin</p> Signup and view all the answers

    Which artery is NOT a major contributor to the vasculature of the anterior abdominal wall?

    <p>Renal artery</p> Signup and view all the answers

    Which structure is located within the inguinal canal?

    <p>Cremaster muscle</p> Signup and view all the answers

    How can indirect inguinal hernias be distinguished from direct inguinal hernias?

    <p>Indirect hernias occur through the deep inguinal ring.</p> Signup and view all the answers

    Which layer contains both extraperitoneal connective tissue and the peritoneum?

    <p>Transversalis fascia</p> Signup and view all the answers

    Which fascia is characterized as the superficial fatty layer of the abdominal wall?

    <p>Camper’s fascia</p> Signup and view all the answers

    What is the primary action of the External Abdominal Oblique muscle?

    <p>Abdominal compression during expiration</p> Signup and view all the answers

    Which of the following is NOT included as a structure associated with the Internal Abdominal Oblique?

    <p>Inguinal ligament</p> Signup and view all the answers

    What type of fascia covers the innermost surface of the deepest anterior abdominal wall muscle layer?

    <p>Transversalis fascia</p> Signup and view all the answers

    Which layer of fascia is well-developed in the lower anterior abdominal wall?

    <p>Camper's fascia</p> Signup and view all the answers

    The Internal Abdominal Oblique muscle originates from which region?

    <p>Thoracolumbar fascia and iliac crest</p> Signup and view all the answers

    Which structure is formed by the aponeurosis of the External Abdominal Oblique?

    <p>Inguinal ligament</p> Signup and view all the answers

    What is the innervation of the Internal Abdominal Oblique muscle?

    <p>Anterior rami of lower thoracic spinal nerves T7-12</p> Signup and view all the answers

    What is a key function of the Transversalis fascia?

    <p>Covering the deep abdominal wall muscles</p> Signup and view all the answers

    Which layer of fascia is known for its membranous quality?

    <p>Scarpa's fascia</p> Signup and view all the answers

    What is the main function of the iliohypogastric and ilioinguinal nerves in relation to the anterior abdominal wall?

    <p>They innervate all the muscles of the anterior abdomen.</p> Signup and view all the answers

    Which spinal nerve levels correspond with the dermatomal distribution for the umbilicus?

    <p>T10</p> Signup and view all the answers

    Where does the inferior epigastric artery originate?

    <p>From the external iliac artery</p> Signup and view all the answers

    What type of drainage do the lumbar and subcostal veins primarily contribute to?

    <p>Azygos system</p> Signup and view all the answers

    What is a notable consequence of portal hypertension regarding blood flow related to the umbilical area?

    <p>Retrograde flow through the paraumbilical veins.</p> Signup and view all the answers

    Which statement best describes the anatomical course of the nerves of the anterior abdominal wall?

    <p>They course inferiorly and medially within the neurovascular plane.</p> Signup and view all the answers

    Which fascia is responsible for forming the deep inguinal ring?

    <p>Transversalis fascia</p> Signup and view all the answers

    How do the superior and inferior epigastric arteries interact?

    <p>They anastomose within the rectus abdominis muscle.</p> Signup and view all the answers

    What structure is derived from the lower fibers of the internal abdominal oblique muscle?

    <p>Cremasteric muscle</p> Signup and view all the answers

    Which nerve supplies sensory innervation to the anterior scrotum and upper medial thigh?

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

    The external spermatic fascia is derived from which muscle fascia?

    <p>External abdominal oblique fascia</p> Signup and view all the answers

    Where does the deep circumflex iliac artery primarily supply blood?

    <p>Lateral aspects of the abdominal wall</p> Signup and view all the answers

    Which fascia ensheathes the ductus deferens, testis, and blood vessels?

    <p>Internal spermatic fascia</p> Signup and view all the answers

    What anatomical relationship exists between the ilioinguinal nerve and the inguinal canal?

    <p>It enters the canal and supplies the anterior scrotum/labium majus.</p> Signup and view all the answers

    What confirms the integrity of the L1-L2 spinal cord segments during the cremasteric reflex?

    <p>Stroking the upper, medial thigh</p> Signup and view all the answers

    What anatomical structure connects the scrotum to the retroperitoneal region in males?

    <p>Ductus deferens</p> Signup and view all the answers

    Which ligament serves as the medial boundary of the inguinal canal?

    <p>Lacunar ligament</p> Signup and view all the answers

    Which structures are found in the anterior wall of the inguinal canal?

    <p>Aponeurosis of external abdominal oblique</p> Signup and view all the answers

    Which structure is responsible for forming the posterior wall of the inguinal canal?

    <p>Aponeurosis of transversus abdominis</p> Signup and view all the answers

    What defines the floor boundary of the inguinal canal?

    <p>Inguinal ligament</p> Signup and view all the answers

    Which lymphatic nodes do the superficial lymphatics of the anterior abdominal wall primarily drain into?

    <p>Axillary nodes</p> Signup and view all the answers

    Where do lymphatics from abdominal wall muscles predominantly drain?

    <p>Lumbar nodes</p> Signup and view all the answers

    Which statement accurately depicts the direction of the inguinal canal?

    <p>Parallel and superior to the inguinal ligament</p> Signup and view all the answers

    What forms the remainder of the medial posterior wall of the inguinal canal?

    <p>Transversus abdominis aponeurosis</p> Signup and view all the answers

    Which option is NOT a structure that transmits through the inguinal canal?

    <p>Feminine urethra</p> Signup and view all the answers

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