The valsalva maneuver involves expiring against a closed glottis and, when combined with contracting muscles of the abdomen and ribcage, creates rigidity in the entire torso. true or false?

True.

Explanation:

The Valsalva maneuver is performed by forcibly exhaling against a closed airway. Maneuver variations can be used either in medicine, as a test of cardiac function and autonomic nervous control of the heart. A modified version is done by expiring against a closed glottis. This will bring forth the cardiovascular responses but will not force air into the eustachian tubes.

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