| 11. | The Eustachian tube connects from the chamber of the middle ear to the back of the nasopharynx.
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| 12. | This will elicit the cardiovascular responses described below but will not force air into the Eustachian tubes.
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| 13. | One of these muscles, the tensor veli palatini, also acts to open the eustachian tube.
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| 14. | Via the Eustachian tube, material from the external ear can enter the mouth and be tasted.
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| 15. | In fact, the eustachian tubes are not located close enough to the mandible to be pinched off.
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| 16. | Major causes are ear infections or conditions that block the eustachian tube, such as allergies or tumors.
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| 17. | You also get a similar effect by yawning, since the yawning mechnaism also involves the eustachian tubes.
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| 18. | It is located posterior to the opening of the Eustachian tube on the lateral wall of the nasopharynx.
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| 19. | But during a steep descent, pressure that builds up outside the body can push the eustachian tube closed.
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| 20. | It has been estimated that about 30 % of people with Meniere's disease have eustachian tube dysfunction.
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