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Swallowing process involves ____ muscles, ____ cranial nerves, and ____ cervical nerve roots
55 muscles, 6 cranial nerves, 2 cervical nerve roots
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Swallow is triggered where and how?
- With sensory input from tongue, tonsils, faucial arches, and posterior pharyngeal wall
- Then transmitted to MEDULLA OBLONGATA AND PONTINE RETICULAR SYSTEM
- through the VII, IX, and X nerves
- Info is sent to the NUCLEAUS AMBIGUOUS which initiates the pharyngeal swallow
- Info is sent BACK to mucles that help swallow through the V, VII, IX, X, and XII nerves
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The most sensitive oropharyngeal mucosal recepetor region for stimulation of the swallow are innervated by
- fibers of the GLOSSOPHARYNGEAL NERVE via the pharyngeal plexus and by the SUPERIOR LARYNGEAL NERVE via the vagus nerve.
- THE SLN AND CN9 SEND INFO TO NUCLEAUS TRACTUS SOLITARIES (NTS) in the brainstem. THe NTS is the principal sensory nucleus of the pharynx and esophagus.
- SLN is the main affarent pathway in swallowing
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