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10 Cards in this Set
- Front
- Back
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Quiet Inspiration Forced Inspiration |
Quiet Inspiration- involves minimal muscular activity, primarily that of the diaphragm
Forced Inspiration- involves both diaphragm and accessory muscles of inspiration |
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Diaphragm |
-primary muscle of inspiration with attachmentsalong lower margin of rib cage, sternum, and vertebral column -separates thoracic cavity from abdominal cavity -3 hiatuses (openings) |
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Central Tendon |
-large aponeurosis making up the central portion of the diaphragm |
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Crura |
-plural of "crus" -left and right crura are points of vertebral attachment of the diaphragm |
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Phrenic Nerves |
-nerves arising from cervical plexus (group of nerves coming from spinal nerves) that innervate muscular activity of the diaphragm |
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External Intercostals |
-anterior thoracic muscle of inspiration -originate in lower surface of each rib and course down/in to insert into upper surface of the rib below -contraction of these muscles results in rib cage elevation during inspiration |
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Internal Intercostal Muscles Interchondral Portion |
-anterior thoracic muscles of inspiration -elevate ribs |
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Levatores Costarum (Brevis and Longis) Serratus Posterior Superior |
-posterior thoracic muscles of inspiration -elevate rib cage |
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Sternomastoid Scalenes (Anterior, Middle, Posterior) |
-accessory muscles of neck (inspiration) -sternomastoid elevates sternum (and by association, rib cage) -scalenes elevate ribs 1 and 2 |
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Pectoralis Major Pectoralis Minor |
-muscles of upper arm and shoulder (inspiration) -elevates sternum increasing transverse dimension of rib cage |
