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5 a person is in respiratory distress, the origin and insertion of the serratus anterior muscle may actually When switch, and the part of the muscle attached to the medial border of the scapula acts as the origin. How will this change the muscles action?
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First of all It is innervated on the superficial side.and what happens when someone in respiratory distress holds onto something to stabilize their upper limb.and as scapula act as an origin, and the insertion the ribs and the pect minor can help pull the ribs to allow more air into the lungs.

The normal origin of the serratus muscle is the lateral surface of the 1st to 8th ribs, and the insertion is on the rib surface of the medial border of the scapula.when person is in respiratory distress this need to increase the volume of thoracic cage.and that's why scapula work as origin of the muscle.

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