| Suboccipital triangle | |
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| Deep muscles of the back. Triangle is labeled in turquoise. | |
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| Posterior atlantoöccipital membrane and atlantoaxial ligament. (Triangle is not labeled, but region is visible.) | |
| Gray's | subject #116 402 |
The suboccipital triangle is a region of the neck bounded by the following three muscles:
It is covered by a layer of dense fibro-fatty tissue, situated beneath the Semispinalis capitis.
The floor is formed by the posterior occipito-atlantal membrane, and the posterior arch of the atlas.
In the deep groove on the upper surface of the posterior arch of the atlas are the vertebral artery and the first cervical or suboccipital nerve.
 The vertebral vein. |
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