Nuchal lines
Encyclopedia : N : NU : NUC : Nuchal lines
Nuchal lines Occipital bone . Outer surface. (Nuchal lines are identified at left.)
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| colspan="2" |Side view of head, showing surface relations of bones. (Superior and median lines visible at bottom right.)
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|Latin [subject #31 ]
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The nuchal lines are four curved lines on the external surface of the occipital bone :
The upper, often faintly marked, is named the highest nuchal line , and to it the galea aponeurotica is attached. From the external occipital protuberance a ridge or crest, the median nuchal line , often faintly marked, descends to the foramen magnum , and affords attachment to the ligamentum nuchæ .
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