How do dermatomes develop?

Updated: Oct 13, 2017
  • Author: Stephen Kishner, MD, MHA; Chief Editor: Thomas R Gest, PhD  more...
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Dermatomes are derived from the outer portion of an embryo from which the skin and subcutaneous tissues are developed and become the areas of skin supplied by the branches of a single dorsal root ganglion. In the developing embryo, dermatomes arise from somitic mesoderm, which develops from the middle layer of embryonic tissue lateral to the developing neural tube. Dermatomes are arranged with basic segmental pattern in the vertebrate trunk, although some overlap exists with similar areas above and below.

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