Thoracic Wall

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Questions and Answers

Which muscle does the breast rest anteriorly on?

  • Serratus anterior
  • Pectoralis major (correct)
  • Deltoid
  • Trapezius

Where does the breast extend from on the thoracic wall?

  • Sternum to midaxillary line (correct)
  • Midaxillary line to spine
  • Midclavicular line to spine
  • Sternum to spine

What is the potential space between the deep pectoral fascia and superficial fascia called?

  • Bursa
  • Suspensory ligaments
  • Axillary tail
  • Retromammary space (correct)

What is the function of the suspensory (Cooper's) ligaments in the breast?

<p>To support the breast tissue (B)</p> Signup and view all the answers

Where may the nipple lie in relation to the intercostal spaces?

<p>Anterior to the 4th intercostal space (B)</p> Signup and view all the answers

Flashcards

Muscle underlying the breast

The pectoralis major muscle.

Breast's Thoracic Wall Extent

From the sternum to the midaxillary line.

Potential space behind breast

Retromammary space.

Function of Cooper's ligaments

To support breast tissue.

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Nipple location

Anterior to the 4th intercostal space.

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Study Notes

Breast Anatomy

  • The breast rests anteriorly on the pectoralis major muscle.
  • The breast extends from the second rib to the sixth or seventh rib on the thoracic wall.
  • The potential space between the deep pectoral fascia and superficial fascia is called the retromammary space.
  • The suspensory (Cooper's) ligaments help support the breast and maintain breast shape. They run from the skin to the deep fascia of the breast, helping to prevent sagging.
  • The nipple typically lies between the fourth and fifth intercostal spaces.

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