Chest Wall Anatomy
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Transcript of Chest Wall Anatomy
Chest Wall Anatomy
A. Azami, Ph.D.
Surface Landmarks
Boundaries of the thorax• Superior:
jugular notch, sternoclavicular joint, superior border of clavicle, acromion, spinous processes of C7
• Inferior:xiphoid process, costal arch, 12th and 11th ribs, vertebra T12
Thoracic wall• Skin • Superficial fascia
– Fat tissue– Cutaneous nerves– Superficial vessels
Breast• Deep fascia• Muscles
The segmental innervation of anterior surface of trunk
Thoracic wall• Skin • Superficial fascia
– Fat tissue– Cutaneous nerves– Superficial vessels
• Breast• Deep fascia• Muscles
Thoracic wall• Skin • Superficial fascia
– Fat tissue– Cutaneous nerves– Superficial vessels
• Breast• Deep fascia• Muscles
Thoracic wall• Skin • Superficial fascia
– Fat tissue– Cutaneous nerves– Superficial vessels
• Breast• Deep fascia• Muscles
Back muscles
Serratus anterior
Ant. Thoracic muscles
Thorax Muscles• Intercostales externi• Intercostales interni
Intercostales externi• Origin: lower border of rib• Insertion: upper border of
rib below origin• Action: elevate ribs adding
in forced inspiration
Intercostales interni• Origin: upper border of rib• Insertion: lower border of rib
above origin• Action: depress ribs for
forced expiration
DiaphragmShape and position:
dome-shaped between thorax and abdomen
Origin
• Sternal part: xiphoid process• Costal part: lower six and costal
cartilages• Lumbar part: arises from upper 2-3
lumbar vertebraeInsertion• central tendon
Diaphragm
Inspirationmovements of:
• Diaphragm• Sternum• Ribs
sternum
Ribs
Intercostal space