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Related Flashcards
Cards In This Set
| Front | Back |
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The head of the rib articulates with what?
The articulation point is at? |
Vertebral body;
Costal facet (demifacet) |
|
The tubercle of the rib articulates with the what of the thoracic vertebrae?
|
Transverse processes
|
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During inspiration the rib pivots around what articulation?
|
Tubercle of rib with transverse process of thoracic vertebrae
|
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The ribs incline inferiorly from their POSTERIOR attachment to the what column to their ANTERIOR attachment to the what?
|
Posterior attachment to vertebral column
Anterior attachment to sternum |
|
What is the "pump-handle" movement during inspiration?
Does the thorax elevate or depress during inspiration? |
An increase in the anterior-posterior dimension of the thorax (because of their attachment to ribs, elevation will result)
Elevate |
|
The muscle fibers of the thoracic diaphragm are arranged how?
They originate from where? Contraction results in an increase in what dimension of the thorax during inspiration? |
Radially;
Sternum, Costal margin, & Vertebral Column; Superior-Inferior dimension |
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What is primary muscle of inspiration?
|
Thoracic diaphragm
|
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The abdominal viscera is basically compressible or incompressible?
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Incompressible!
|
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Contraction and descent of diaphragm lifts what around the the abdominal viscera?
|
Costal margin
|
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Are the ribs fixed anteriorly or posteriorly?
This results in what type of expansion of the thorax, the "bucket handle" movement? |
Posteriorly
Lateral |
|
What muscles are attached obliquely to the ribs?
Contraction will result in elevation of the more superior or inferior rib? Inspiration will have a a expansion or depression of volume? |
External intercostals & Intrachondral parts of the internal intercostal muscles!
Inferior; Expansion |
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In forced inspiration, any muscles which can elevate ribs are used. Name?
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Sternocleidomastoid and Scalene Muscles
|
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In quiet breathing of muscles, and elastic recoil of the thoracic wall and lungs results in?
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Expiration
|
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The intercostal part of the internal intercostals and the innermost intercostals attach more what to the ribs?
|
Perpendicular
|
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In active expiration, contraction results in depression of the ribs and and an increase or decrease in thoracic volume?
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Decrease
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