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hypoglossal |
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hypoglossal /hy·po·glos·sal/ (hi´po-glos´al) sublingual.
hypoglossal [-glos′əl] Etymology: Gk, hypo, under, glossa, tongue pertaining to nerves or other structures under the tongue. hypoglossal situated beneath the tongue, as the hypoglossal nerve. hypoglossal cord the large aggregation of myogenic cells which migrates from somites 3-5 to a location ventral to the pharynx, and forms the tongue. hypoglossal nerve paralysis causes difficulty in prehension, deglutition and mastication. Unilateral lesions cause deviation of the protruded tongue toward the side of the lesion. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The fistulous tract ascends along the carotid sheath, then posterior to the common carotid artery, then superior to the superior laryngeal, hypoglossal, and vagus nerves; it finally opens into the piriform sinus. For example, nanosized ferritin and iron-dextran, after injection into the tongue of mice, labeled the neurons of the hypoglossal nuclei, and injection of both of these NSPs into facial muscles of mice also resulted in synaptic uptake; cationized ferritin was also detected in cell bodies of facial neurons, indicating that electrical charge is of importance for incorporation into axons and axonal transport (Arvidson 1994; Malmgren et al. The hypoglossal canals, a pair of bony tubes located on the left and right sides of the skull's base, were nominated just last year as skeletal signposts of speech. |
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