Lumbar enlargement

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Lumbar enlargement
Diagrams of the medulla spinalis. (Cervical enlargement labeled at center right.)
Latin intumescentia lumbosacralis
Gray's subject #185 752
Dorlands/Elsevier i_11/12457957

The lumbar enlargement (or lumbosacral enlargement) gives attachment to the nerves which supply the lower limbs.

It commences about the level of the ninth thoracic vertebra, and reaches its maximum circumference, of about 33 mm., opposite the last thoracic vertebra, below which it tapers rapidly into the conus medullaris.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.