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Dermatomes divide the skin according to sensory nerve distribution (see Image. Dermatome Map). One of the first to map out and discuss the dermatomes is O. Foerster in his 1933 publication entitled “The Dermatomes in Man” in the journal Brain. Some consider his work the foundation of dermatomal theory.[1] In 1948, J. Keegan and F. Garrett described spinal nerve distribution in the publication "The Segmental Distribution of the Cutaneous Nerves in the Limbs of Man,” which appeared in The Anatomical Record.[2] However, in 2008, M. Lee, R. McPhee, and M. Stringer published “An Evidence-Based Approach to Human Dermatomes” on Clinical Anatomy, which contested some classic dermatomal maps. It also proposed an evidence-based method for accurately mapping out human dermatomes.[3][4] This article focuses on dermatomes, which are essential to diagnose and manage various neurologic conditions correctly.