Anatomy of the Pectoral Region
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Questions and Answers

What is the relationship between the cutaneous vessels and the perforating branches of the internal thoracic artery?

  • The cutaneous vessels are supplied by the perforating branches of the internal thoracic artery.
  • The cutaneous vessels are accompanied by the perforating branches of the internal thoracic artery. (correct)
  • The cutaneous vessels have no relationship with the perforating branches of the internal thoracic artery.
  • The cutaneous vessels are larger than the perforating branches of the internal thoracic artery.

    • What is the function of the platysma muscle?

  • The platysma muscle is responsible for moving the clavicle and side of the neck.
  • The platysma muscle protects the external jugular vein from external pressure.
  • The platysma muscle is responsible for supplying the breast with blood vessels.
  • The platysma muscle is responsible for wrinkling the skin of the neck when the angle of the mouth is pulled down. (correct)

    • Where does the platysma muscle originate from?

  • The platysma muscle originates from the base of the mandible and the skin over the posterior and lower part of the face.
  • The platysma muscle originates from the internal thoracic artery.
  • The platysma muscle originates from the clavicle and the side of the neck.
  • The platysma muscle originates from the deep fascia covering the pectoralis major. (correct)

    • What is the relationship between the areas supplied by the C3, C4, T2, and T3 spinal nerves?

    <p>The areas supplied by C3 and C4 do not overlap, and the areas supplied by T2 and T3 do not overlap.</p> Signup and view all the answers

    What is the origin of the cutaneous vessels?

    <p>The cutaneous vessels originate from the posterior intercostal arteries.</p> Signup and view all the answers

    What is the area supplied by the intercostobrachial nerve of T2?

    <p>Floor of the axilla and upper half of the medial side of the arm</p> Signup and view all the answers

    Which nerves supply the skin below the level of the second rib?

    <p>Anterior and lateral cutaneous branches of the second to sixth intercostal nerves</p> Signup and view all the answers

    Which nerves are branches of the cervical plexus and supply skin over the upper half of the deltoid?

    <p>Medial, intermediate, and lateral supraclavicular nerves</p> Signup and view all the answers

    What is the area supplied by spinal nerves C3 and C4?

    <p>Skin over the upper half of the deltoid</p> Signup and view all the answers

    Why does the area supplied by spinal nerves C3 and C4 meet the area supplied by spinal nerves T2 and T3?

    <p>Because of intervening nerves being pulled away to supply the upper limb</p> Signup and view all the answers

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