Two Minutes of Anatomy: Diaphragm

Diaphragm
Dome shaped sheath of skeletal muscle.
Spans the lower edge of ribcage.
Separates chest cavity & abdominal cavity.
Primary breathing muscle.
Origins:
Vertebral: Crura from vertebral bodies L1- L2 (left) & L1-L3 (right). *Costal: Medial & lateral arcuate ligaments & costal cartilage of ribs #7-12.
Sternal: Posterior aspect of xiphoid.
Insertion: Central aponeurotic tendon.
Action: Inspiration.
Innervation:
Motor: Phrenic nerve (C3-C5).
Sensory: Phrenic nerve, intercostal nerves (#6-12) & upper two lumbar nerve roots (L1-L2).

Dr Donald A Ozello DC of Championship Chiropractic in Las Vegas, NV
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