Abdomen Lecture: Bony Framework, Muscles, and Innervation

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What is the bony framework of the abdomen composed of?

Thoracic aperture and diaphragm

Pelvic bones and costal margin

5 lumbar vertebrae & their intervertebral disc (IVD) (correct)

Quadratus lumborum and psoas major

Which muscles reinforce the posterior aspect of the abdominal wall?

Quadratus lumborum, Psoas major, Iliacus (correct)

Rectus abdominis, External oblique, Internal oblique

Pectoralis major, Deltoid, Triceps brachii

Transversus abdominis, Rectus abdominis, Serratus anterior

Which structure forms the superior opening to the abdomen?

Diaphragm

Pelvic inlet

Rib 12

Inferior thoracic aperture (correct)

Which of the following is NOT a component of the abdominal wall's bony elements?

Sacrum Signup and view all the answers

What is the main function of quadratus lumborum, psoas major, and iliacus muscles?

Major flexors of hip joint Signup and view all the answers

Which structure encloses a single large peritoneal cavity that freely communicates with the pelvic cavity?

Abdominal wall Signup and view all the answers

Which of the following muscles predominantly forms the lateral part of the abdominal wall?

Transversus abdominis Signup and view all the answers

What is the superficial fascia of the abdominal wall called?

Camper’s fascia Signup and view all the answers

In men, which specialized fascial layer contains smooth muscle fiber and is formed from the superficial fascia of the abdominal wall?

Dartos fascia Signup and view all the answers

What is the inferior extension of Scarpa's fascia called?

Fascia lata Signup and view all the answers

Which structures contribute to the superior part of the posterior abdominal wall?

Diaphragm and lumbar plexus Signup and view all the answers

What is the structure between the parietal peritoneum and the muscles in the posterior abdominal wall called?

Psoas sheath Signup and view all the answers

Where does the superficial perineal fascia (Colles’ fascia) continue into in women?

Labia majora and anterior part of perineum Signup and view all the answers

Which muscles predominantly form the lateral parts of the abdominal wall?

Transversus abdominis, internal oblique, and external oblique Signup and view all the answers

What does Camper’s fascia contain?

Fat and varies in thickness. Signup and view all the answers

Where does Scarpa’s fascia fuse with another structure just below the inguinal ligament?

Fascia lata. Signup and view all the answers

Abdomen Lecture: Bony Framework, Muscles, and Innervation

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