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Anatomy: Thoracic Wall and Intercostal Space

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Anatomy: Thoracic Wall and Intercostal Space

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Questions and Answers

The opening bounded by the 12th thoracic vertebra, curving costal margin, and xiphisternal joint is closed by which structure?

Endothoracic fascia

Diaphragm (correct)

Pleura

Intercostal muscles

Which of the following muscles are present in each intercostal space?

External intercostal, internal intercostal, and innermost intercostal (correct)

External intercostal and internal intercostal

Intercostal, transversus abdominis, and diaphragm

External intercostal, internal intercostal, and transversus abdominis

What is the relationship between the intercostal nerves and the intercostal muscles?

The intercostal nerves supply the intercostal muscles but not the skin or parietal pleura/peritoneum

The intercostal nerves supply the skin and parietal pleura/peritoneum, but not the intercostal muscles

The intercostal nerves supply the intercostal muscles, skin, and parietal pleura/peritoneum (correct)

The intercostal nerves only supply the parietal pleura and peritoneum, and not the skin or intercostal muscles

What is the relationship between the intercostal nerves and the intercostal neurovascular bundle?

The intercostal nerves are located within the intercostal neurovascular bundle Signup and view all the answers

What is the function of the external intercostal muscles?

To pull the ribs closer together Signup and view all the answers

Where is the endothoracic fascia located?

Between the muscles and bones of the thoracic wall and the parietal pleura Signup and view all the answers

What is the order of structures in the intercostal neurovascular bundle from top to bottom?

Vein, Artery, Nerve Signup and view all the answers

Which thoracic spinal nerves supply the anterior abdominal wall?

Thoracic nerves 7-11 Signup and view all the answers

Where does the anterior ramus of the 12th thoracic nerve run?

Forward in the abdomen as the subcostal nerve Signup and view all the answers

What is the unique feature of the first thoracic nerve compared to the other thoracic nerves?

It has no anterior cutaneous branch Signup and view all the answers

What is the name of the bony framework that forms the walls of the thorax?

Thoracic cage Signup and view all the answers

What is the shape of the thorax?

Flattened in front and back, but rounded on the sides Signup and view all the answers

What structure forms the posterior part of the thoracic cage?

Vertebral column Signup and view all the answers

What structure occupies the opening at the superior end of the thorax?

Structures that pass between the neck and thorax Signup and view all the answers