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The intergluteal cleft or just gluteal cleft, also known by a number of synonyms, including natal cleft and cluneal cleft, is the groove between the buttocks that runs from just below the sacrum to the perineum, [1] so named because it forms the visible border between the external rounded protrusions of the gluteus maximus muscles.
A bifid nose (also known as cleft nose) is an uncommon congenital malformation which is characterized by the presence of a cleft between the two nostrils of the nose. [1] It is the result of a disturbance during embryological nose development. [2] It is part of the Tessier classification for craniofacial clefts. [3]
Submucous cleft palate can also occur, which is a cleft of the soft palate with a split uvula, a furrow along the midline of the soft palate, and a notch in the back margin of the hard palate. [12] The diagnosis of submucous cleft palate often occurs late in children as a result of the nature of the cleft. [13]
The masses of the gluteus maximus muscle are separated by an intermediate intergluteal cleft or "crack" in which the anus is situated. The buttocks allow primates to sit upright without resting their weight on their feet as four-legged animals do. Females of certain species of baboon have red buttocks that blush to attract males.
The joint is palpable deep within the natal cleft, and can be felt as a horizontal groove. With the palpating finger on the dorsal surface of the coccyx, a degree of rotation can be produced with an applied forward pressure.
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split, cleft Greek σχῐστός (skhistós), cloven, divided schistocyte: schiz(o)-denoting something "split" or "double-sided" Greek σχῐ́ζω (skhízō), I split, cleave, part; irregular formation of the verb σχῐ́ζειν (skhízein), to cut, split schizophrenia: scler(o)-hard Greek σκληρός (sklērós) scleroderma-sclerosis ...
An example of a birth defect is cleft palate, which occurs during the fourth through seventh weeks of gestation. [14] Body tissue and special cells from each side of the head grow toward the center of the face. They join to make the face. [14] A cleft means a split or separation; the "roof" of the mouth is called the palate. [15]