Thoracic and Abdominal Wall Anatomy Quiz

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Questions and Answers

Which muscle assists in raising intra-abdominal pressure, flexing and rotating the trunk?

Internal abdominal oblique

Rectus abdominis

Transversus abdominis

External abdominal oblique (correct)

Where does the inferior epigastric artery arise from?

Femoral artery

Internal iliac artery

External iliac artery (correct)

Common iliac artery

What is the unique feature of the superficial fascia of the lower portion of the anterolateral abdominal wall?

It is more extensive inferiorly (correct)

It is thinner than the upper portion

It forms the anterior exposure of the rectus abdominis muscle

It is innervated by the subcostal nerve

What is the function of the rectus abdominis muscle?

All of the above Signup and view all the answers

Which artery supplies the lower portion of the rectus abdominis?

Inferior epigastric artery Signup and view all the answers

What is the origin of the internal abdominal oblique muscle?

Thoracolumbar fascia; anterior 2/3 of iliac crest Signup and view all the answers

What is the insertion point of the rectus abdominis muscle?

Xiphoid process and costal cartilages 5-7 Signup and view all the answers

What is the primary function of the transversus abdominis muscle?

Raise intra-abdominal pressure Signup and view all the answers

Which nerve innervates the external abdominal oblique muscle?

T6/7-T11 intercostal nerves Signup and view all the answers

What is the structure that forms the vertical seam at the midline where the aponeuroses from each side meet?

Linea alba Signup and view all the answers

Which of the following is a function of the anterolateral thoracic wall?

Containment/protection of vital viscera Signup and view all the answers

Which structures articulate directly with the sternum?

True ribs Signup and view all the answers

What are the boundaries of the superior thoracic aperture?

First rib, superior border of manubrium, first thoracic vertebra Signup and view all the answers

Which ribs possess a small costal cartilage at their tips but do not articulate with the sternum?

Floating ribs (11 and 12) Signup and view all the answers

Where does each typical rib articulate with its respective thoracic vertebra?

At 2 places: facet for tubercle of rib and facet for head of rib Signup and view all the answers

What is the function of the anterolateral abdominal wall?

Produce intra-abdominal pressure changes Signup and view all the answers

Which ribs articulate with the sternum indirectly, by way of the costal cartilage of rib 7?

False ribs (8-12) Signup and view all the answers

Which structures participate in respiration?

Anterolateral thoracic wall and diaphragm Signup and view all the answers

What are the boundaries of the inferior thoracic aperture?

Costal margin, inferior sternum, 12th thoracic vertebra Signup and view all the answers

What is the function of the thoracic cage?

Containment/protection of vital viscera Signup and view all the answers

Which muscle is part of the layers of the anterolateral thoracic wall?

Pectoralis major Signup and view all the answers

Where is the neurovascular plane located in the anterior abdominal wall?

Between the internal oblique and transversus abdominis Signup and view all the answers

How many pairs of ribs articulate with the sternum via synovial joints?

7 Signup and view all the answers

What separates the pleural cavities and the thoracic wall?

Endothoracic fascia Signup and view all the answers

Which muscle is not part of the layers of the anterolateral thoracic wall?

External oblique Signup and view all the answers

What serves the function of containing and protecting vital organs in the abdominal wall?

Endoabdominal fascia Signup and view all the answers

What is the inferior border of the external oblique muscle?

Inguinal ligament Signup and view all the answers

How are the layers and arrangement of the abdominal muscles related to those of the intercostals in the thoracic region?

They have a common embryonic origin Signup and view all the answers

Where is the neurovascular plane located in the thoracic wall?

Between the internal and innermost intercostal layers Signup and view all the answers

What is the significance of the endothoracic fascia in abdominal wall anatomy?

It separates the pleural cavities and the thoracic wall Signup and view all the answers

Study Notes

Thoracic and Abdominal Wall Anatomy

The thoracic cage consists of 12 pairs of ribs, with ribs 1-10 articulating via costal cartilages and ribs 2-7 articulating with the sternum via synovial joints.
Ribs articulate with the vertebral column, with different movements possible at each articulation point.
Counting ribs involves starting posteriorly at the vertebra prominens and anteriorly at the sternal angle.
The layers of the anterolateral thoracic wall include extrinsic muscles like pectoralis major & minor and intrinsic muscles like intercostals.
The neurovascular plane is located between the internal and innermost intercostal layers.
The endothoracic fascia separates the pleural cavities and the thoracic wall and is important surgically.
The anterior abdominal wall serves functions like containing and protecting vital organs and facilitating movement of GI, reproductive, and urogenital contents.
It consists of layers like the superficial fascia, containing Camper’s and Scarpa’s fascia, and muscles including external oblique, internal oblique, and transversus abdominis.
The inferior border of the external oblique is the inguinal ligament, and the neurovascular plane is located between the internal oblique and transversus abdominis.
The layers and arrangement of the abdominal muscles resemble those of the intercostals in the thoracic region due to their common embryonic origin.
The endoabdominal fascia is given regional names and is important in abdominal wall anatomy.
The boundaries and extent of the membranous layer in the anterior abdominal wall are illustrated, covering the external genitalia as well.

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Description

Test your knowledge of thoracic and abdominal wall anatomy with this quiz. Explore the layers, muscles, and neurovascular planes of the thoracic cage and anterior abdominal wall, and learn about the articulations and movements of ribs and the functions of the anterior abdominal wall.