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Semicircular Ducts

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Definition: The three membranous semicircular ducts within the bony semicircular canals. They open into the UTRICLE through five openings. Each duct has at one end a sensory area called the ampullary crest. AMPULLARY HAIR CELLS of the crests sense the movement of ENDOLYMPH resulting from rotation of the head.     
Examples Hair Cells, Ampulla 		Other names Semicircular Duct; Ducts, Semicircular; Duct, Semicircular; Crista Ampullari; Crests, Ampullary; Crest, Ampullary; Ampullary Crests; Ampullaris, Crista; Ampullari, Crista; Crista Ampullaris; Ampullary Crest

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Sources: NLM Medical Subject Headings, NIH UMLS, Drugs@FDA, FDA AERS original data copyright United States Government. No endorsement implied. Last modified 6/6/2012
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