In embryology(a field of bio related to the study of embryo), a myotome is also defined as a tissue group that develops along the body wall in vertebrate embryos. 
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A myotome is the group of muscles that a single spinal nerve root innervates. Similarly a dermatome is an area of skin that a single nerve innervates. In vertebrate embryonic development, a myotome is a group of tissues formed from somites. These somites develop into the body wall muscle.
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