Lumbar triangle
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| Lumbar triangle | |
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| Muscles connecting the upper extremity to the vertebral column. (Lumbar triangle labeled at bottom left.) | |
| Latin | trigonum lumbale inferius |
| Gray's | subject #121 434 |
| Dorlands/Elsevier | t_19/12823505 |
The lateral margin of the Latissimus dorsi is separated below from the Obliquus externus abdominis by a small triangular interval, the lumbar triangle of Petit, the base of which is formed by the iliac crest, and its floor by the Obliquus internus abdominis.
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