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An epicanthic fold or epicanthus [6] is a skin fold of the upper eyelid that covers the inner corner (medial canthus) of the eye. [3] However, variation occurs in the nature of this feature and the possession of "partial epicanthic folds" or "slight epicanthic folds" is noted in the relevant literature.
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An epicanthic fold, the skin fold of the upper eyelid covering the inner corner (medial canthus) of the eye, may be present based on various factors, including ancestry, age, and certain medical conditions. In some populations the trait is almost universal, specifically in East Asians and Southeast Asians, where a majority, up to 90% in some ...
Although an epicanthic fold can also be associated with a less prominent upper eyelid crease (a feature commonly termed "single eyelids" as opposed to "double eyelids"), the two features are distinct; a person may have both epicanthal folds and an upper eyelid crease, one and not the other, or neither. [2]
The canthus (pl.: canthi, palpebral commissures) is either corner of the eye where the upper and lower eyelids meet. [1] More specifically, the inner and outer canthi are, respectively, the medial and lateral ends/angles of the palpebral fissure.
Epicanthic eye folds are believed to be an adaptation protecting the eye from overexposure to ultraviolet radiation, and is presumed to be a particular trait in archaic humans from eastern and southeast Asia. A cold-adaptive explanation for the epicanthic fold is today seen as outdated by some, as epicanthic folds appear in some African ...
Retrieved from "https://en.wikipedia.org/w/index.php?title=Epicanthal_fold&oldid=711618042"This page was last edited on 23 March 2016, at 22:29 (UTC). (UTC).
Mosaic trisomy X can have different outcomes to the non-mosaic condition and further contributes to the variability seen in Trisomy X. [14] Common mosaic forms observed include 46,XX/47,XXX, 45,X/47,XXX (with a Monosomy X cell line), and 47,XXX/48,XXXX (with a tetrasomy X cell line). Complex mosaicism, with cell lines such as 45,X/46,XX/47,XXX ...