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Diaphragm
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| Diaphragm | |
|---|---|
| Muscle Type | |
| Feature | Two regions, crural diaphragm and costal diaphragm. Also left and right hemidiaphragms. |
| Origin | Sternal (arising from two strips under the xiphoid process), costal (arising from inner surfaces of lower six costal cartilages and adjoining ribs, interdigitating with the transversus abdominis muscle), lumbar (arising from the aponeurotic arches and lumbar vertebrae. |
| Insertion | Common insertion point of the central tendon |
| Action | Respiratory, straining, gastro-oesophageal sphincter control. |
| Synergists | |
| Antagonists | |
| Spinal innervation | C3-5 |
| Peripheral Innervation | Phrenic Nerve, separate branches innervate the crural and costal regions. |
| Vasculature | |
