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An incomplete luxation or dislocation; though a relationship is altered, contact between joint surfaces remains. SYN: semiluxation. [sub- + L. locatio, luxation (dislocation)]
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sub·lux·a·tion .səb-.lək-'sā-shən n partial dislocation (as of one of the bones in a joint)
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n.
partial dislocation of a joint, so that the bone ends are misaligned but still in contact.
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sub·lux·a·tion (sub″lək-saґshən) [sub- + luxation] 1. an incomplete or partial dislocation. See illustration. 2. in chiropractic, any mechanical impediment to nerve function; originally, a vertebral displacement believed to impair nerve function. See also vertebral subluxation complex, under complex.
Severe subluxation of cervical vertebra C5 on C6, with bilateral “perched†facets, in a lateral radiograph (A). The diagram (B) delineates the perching of the facets of C5 and C6 (arrow).
Medical dictionary. 2011.