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| | Stuttering and the Valsalva Mechanism: Hypothesis (Site not responding. Last check: 2007-11-02) |
 | | The term Valsalva mechanism (after the Italian anatomist Antonio Maria Valsalva, 1666-1723) refers to those muscles that are neurologically coordinated for simultaneous contraction in the performance of a Valsalva maneuver, which may occur during many kinds of physical exertion (Carlson, Johnson and Cavert, 1961; Ardran and Kemp, 1967; Fink, 1973, 1975; Fink and Demarest, 1978). |
 | | The triggering impulses might be sent to the muscle groups comprising the Valsalva mechanism (as well as to the oral structures that caused the closure of the upper airway) to stimulate their simultaneous contraction, so as to continue the increase of subglottal pressure. |
 | | If tuning of the Valsalva mechanism does, in fact, interfere with the phonatory function of the larynx, then, conversely, it would seem to follow that tuning of the larynx for phonation might tend to reduce the excitability of the Valsalva mechanism in general. |
| www.valsalva.org /jfd.htm (2551 words) |
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