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Designed by Zeptt Technologies
Designed by Zeptt Technologies
📌The thoracic bone region primarily refers to the thoracic cage (rib cage), which protects the organs in the chest, such as the heart and lungs.
• There are 12 thoracic vertebrae in the spine.
• Each vertebra has facets for rib articulation.
• They form the posterior part of the thoracic cage.
2. Ribs (1–12)
• True ribs (1–7): Attach directly to the sternum via costal cartilage.
• False ribs (8–10): Attach indirectly to the sternum via cartilage of the rib above.
• Floating ribs (11–12): Do not attach to the sternum at all.
3. Sternum
• Manubrium: Upper portion that articulates with the clavicles and first two ribs.
• Body: Central, long part where ribs 2–7 attach.
• Xiphoid process: Small, cartilaginous lower part that ossifies in adulthood.
4. Costal Cartilage
• Hyaline cartilage connecting ribs to the sternum.
• Provides flexibility to the rib cage.
📌Functions of the Thoracic Bones:
• Protection: Shields vital organs like the heart and lungs.
• Support: Provides attachment for muscles of respiration, the upper limb, and the back.
• Respiration: Allows expansion and contraction of the thorax during breathing
🔺BLOOD SUPPLY
📌The blood supply from the lateral thoracic wall is derived from branches of the axillary artery
📌The blood supply of the posterior thoracic wall is derived from dorsal branches of the posterior intercostal arteries and the dorsal scapular artery.
🔺VENOUSE SUPPLY
📌 primarily occurs through the intercostal veins, which drain into the azygos
📌 hemiazygos venous systems, ultimately leading to the superior vena cava.
🔺NERVE INTERVENTIONS
📌12 pairs of spinal nerves that originate from the thoracic segments of the spinal cord.
📌 These nerves mainly supply the thoracic bone and associated structure
🔺Clinical Significance
Understanding the applied anatomy of the thoracic boneis essential for diagnosing and treating various conditions, such as:
📌Thoracic spine fractures
📌Scoliosis
📌 Kyphosis
📌Herniated discs
