PHYSIOLOGY
PULMONARY PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The biomechanics of a normal breathing pattern will have and up and out motion of the ____ ribs and an anterior/posterior motion of the ____ ribs.
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lower/upper
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upper/lower
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -The anterior end of the rib is lower than the posterior end; therefore, during elevation of the rib, the anterior end also moves forwards. Movement at costovertebral joints 2 to 6 about a side-to-side axis results in raising and lowering the sternal end of the rib, the “pump-handle” movement.
Detailed explanation-2: -Upper ribs elevate. Motion is of anterior part of the ribs. It pushes sternum ventrally and superiorly. Total motion of sternum and upper ribs together increases in anterior-posterior diameter of thorax. Changes produced mainly by muscles laterally placed in the ribcage. More items
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