Anatomy LE 3: Thorax and Breast
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Questions and Answers

What is the level of the thoracic spine corresponding to the sternal angle or angle of Louis?

  • T7/T8
  • T4/T5 (correct)
  • T2
  • T9

    • What is the location of the dome of the diaphragm?

  • L3
  • T2
  • T9 (correct)
  • T4/T5

    • What is the innervation of the intercostal muscles?

  • Intercostal nerves (correct)
  • Phrenic nerves
  • Brachial nerves
  • Lumbar nerves

    • How many pairs of intercostal muscles are there?

    <p>11</p> Signup and view all the answers

    What is the first layer of muscles found in the region of costal cartilages underneath the silvery lining?

    <p>Internal intercostal muscles</p> Signup and view all the answers

    What is the relationship between the internal intercostal muscles and the external intercostal muscles?

    <p>Internal intercostal muscles are weaker</p> Signup and view all the answers

    What is the structure that bifurcates at the level of the sternal angle of Louis?

    <p>Main airway</p> Signup and view all the answers

    What is the location of the superior angle of the scapula in relation to the thoracic spine?

    <p>T3</p> Signup and view all the answers

    What artery supplies the 1st to 6th intercostal spaces?

    <p>Internal thoracic artery</p> Signup and view all the answers

    Which artery originates from a branch of the subclavian artery?

    <p>Internal thoracic artery</p> Signup and view all the answers

    What is the terminal branch of the internal thoracic artery?

    <p>Musculophrenic artery</p> Signup and view all the answers

    Which artery supplies the 7th to 9th intercostal spaces and the diaphragm?

    <p>Musculophrenic artery</p> Signup and view all the answers

    What happens to the musculophrenic artery below the diaphragm?

    <p>It becomes the superior epigastric artery</p> Signup and view all the answers

    Which veins accompany the intercostal arteries and nerves?

    <p>Intercostal veins</p> Signup and view all the answers

    What is the ultimate destination of the blood from the intercostal veins?

    <p>Superior vena cava</p> Signup and view all the answers

    Which anterior intercostal artery is absent in the 10th-12th intercostal spaces?

    <p>Anterior intercostal artery</p> Signup and view all the answers

    What is the action of the Serratus Posterior Superior Muscle?

    <p>Elevates 2nd-5th ribs</p> Signup and view all the answers

    Which muscle raises ribs with very minimal work?

    <p>Levatores Costarum Muscle</p> Signup and view all the answers

    What is the nerve supply of the Serratus Posterior Superior Muscle?

    <p>IC nerves</p> Signup and view all the answers

    Which muscle depresses 9th-12th ribs?

    <p>Serratus Posterior Inferior Muscle</p> Signup and view all the answers

    What is the origin of the Serratus Posterior Superior Muscle?

    <p>Lower cervical and upper thoracic spines</p> Signup and view all the answers

    Which muscle is an accessory muscle of inspiration?

    <p>Serratus Posterior Superior Muscle</p> Signup and view all the answers

    What is the action of the Transversus Thoracis Muscle?

    <p>Depresses 2nd-5th ribs</p> Signup and view all the answers

    Which muscle is an expiratory muscle?

    <p>Transversus Thoracis Muscle</p> Signup and view all the answers

    Which nerves supply the joints, skin, and deep back muscles?

    <p>Subcostal nerve</p> Signup and view all the answers

    What is the purpose of thoracentesis?

    <p>To remove fluid from the chest cavity</p> Signup and view all the answers

    Why do doctors stick to the superior border of the rib during thoracentesis?

    <p>To avoid the neurovascular bundle</p> Signup and view all the answers

    What percentage of lymphatic drainage ends up in the pectoral or anterior axillary nodes?

    <p>60%</p> Signup and view all the answers

    What is the term for the nerve that is no longer an intercostal nerve due to the absence of a 13th rib?

    <p>Subcostal nerve</p> Signup and view all the answers

    What is the arrangement of the intercostal veins, arteries, and nerves?

    <p>Superior to inferior</p> Signup and view all the answers

    Which nerve transmits parasympathetic trunk?

    <p>Vagus nerve</p> Signup and view all the answers

    Where do most of the lymphatics of our body drain?

    <p>Left subclavian vein</p> Signup and view all the answers

    What is the zone farthest from the nipple-areolar complex in the Face of Clock Breast Examination?

    <p>Zone C</p> Signup and view all the answers

    What is the primary survey framework used in the CHEST INJURY EXAMINATION?

    <p>A-B-C-D-E</p> Signup and view all the answers

    What is the normal respiratory rate in the primary survey?

    <p>18 breaths per minute</p> Signup and view all the answers

    What is the significance of a shifted trachea?

    <p>It is a sign of a severe chest injury</p> Signup and view all the answers

    What is a possible cause of decreased breath sound on the right?

    <p>Blood in the chest cavity</p> Signup and view all the answers

    What is the level of the inferior visceral pleural reflection at the end of expiration?

    <p>8th rib at the mid-axillary line</p> Signup and view all the answers

    What is the level of the thoracic duct transmission through its diaphragmatic opening?

    <p>T10 vertebral level</p> Signup and view all the answers

    What is the purpose of the exposure component of the primary survey?

    <p>To expose the entire body to check for other wounds or injuries</p> Signup and view all the answers

    What is a possible consequence of a shifted trachea?

    <p>Kinking of important vascular and respiratory structures</p> Signup and view all the answers

    What is the importance of checking for other wounds or injuries in the exposure component of the primary survey?

    <p>To identify other wounds or injuries that may be hidden</p> Signup and view all the answers

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