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The dermatome is the dorsal portion of the paraxial mesoderm somite which gives rise to the skin . In the human embryo, it arises in the third week of embryogenesis . [ 2 ] It is formed when a dermomyotome (the remaining part of the somite left when the sclerotome migrates), splits to form the dermatome and the myotome. [ 2 ]
the sclerotome, which forms cartilage, the syndetome, which forms tendons, the Myotome, which forms skeletal muscle, the dermatome, which forms the dermis as well as skeletal muscle, and endothelial cells.
dermatome, myotome, syndetome, sclerotome: Anatomical terminology [edit on Wikidata] Somitogenesis is the process by which somites form.
A dermatome is an area of skin that is mainly supplied by afferent nerve fibres from the dorsal root of any given spinal nerve. [ 1 ] [ 2 ] There are 8 cervical nerves (C1 being an exception with no dermatome), 12 thoracic nerves , 5 lumbar nerves and 5 sacral nerves .
English: A diagram showing human dermatomes, i.e., skin regions with respect to the routing of their afferent nerves through the spinal cord. Svenska: Människans dermatom, sensoriska zonindelning. Date
The notochord and the neural tube activate the protein SHH, which helps the somite to form its sclerotome. The cells of the sclerotome express the protein PAX1 that induces the cartilage and bone formation. The neural tube activates the protein WNT1 that expresses PAX 2 so the somite creates the myotome and dermatome.
Similarly a dermatome is an area of skin that a single nerve innervates with sensory fibers. Myotomes are separated by myosepta (singular: myoseptum ). [ 2 ] In vertebrate embryonic development , a myotome is the part of a somite that develops into muscle.
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