Nuchal lines
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209444938
2008-05-01T12:47:17Z
Gracillis
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[[th:เส้นหลังคอ]]
{{Infobox Bone |
Name = Nuchal lines |
Latin = |
GraySubject = 31 |
GrayPage = 130 |
Image = Nuchal lines.png |
Caption = [[Occipital bone]]. Outer surface. |
Image2 = Gray1193.svg |
Caption2 = Side view of head, showing surface relations of bones. (Superior and median lines visible at bottom right.) |
System = |
MeshName = |
MeshNumber = |
}}
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.
* Below the highest nuchal line is the '''superior nuchal line'''. To it is attached the [[Sternocleidomastoid muscle]], [[Occipitalis muscle]], and [[Splenius capitis muscle]], and the [[trapezius muscle]].
* 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]].
* Running from the middle of this line is the '''inferior nuchal line'''. Attached are the [[Obliquus capitis superior muscle]], [[Rectus capitis posterior major muscle]], and [[Rectus capitis posterior minor muscle]].
==Additional images==
[[Image:Superior_nuchal_line.PNG|thumb|left|300px|Posterior view of superior nuchal line (labeled in red) and muscles connecting to it.]]
<gallery>
Image:Gray187.png|Base of skull. Inferior surface.
</gallery>
==External links==
* {{RocheLexicon|34257.000-1}}
{{Gray's}}
{{Skull}}
[[it:linee nucali]]
[[th:เส้นหลังคอ]]