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Thoracicmuscles - causing inspiration – Central Tendon...

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Click to edit Master subtitle style 5/8/11 Musculature of the Breathing Mechanism Thoracic muscles (8) Neck muscles (2) Torso (4) Abdominal Muscles (2)
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5/8/11 Thoracic Muscles • Diaphragm – Separates lungs and thorax from abdomen – Large inverted bowl shape – Extends superiorly like a dome – Major muscle of inspiration and homestatic breathing – Contraction of diaphragm increases thoracic volume and decreases thoracic pressure causing inspiration
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Unformatted text preview: causing inspiration – Central Tendon – large leafy aponeurosis 5/8/11 Thoracic Muscle cont. • Internal Intercostals – Expiratory muscle – Runs superior to inferior – Completely incase the wall of the ribcage • External intercostals – Inspiratory muscles = raises the ribs – Superficial to internal intercostals 5/8/11 5/8/11...
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