The Dermatomes App for Android is an excellent reference of which spinal nerve roots relay sensation from a particular area of skin. High Definition Anterior & Posterior maps can be zoomed in/out and provide the essential dermatome landmarks. Dermatomes App is an essential reference for neurologists, emergency physicians, family doctors, anesthesiologist, medical students, physiotherapists, chiropractors, osteopaths, and many other medical professionals. A dermatome is an area of skin that is mainly supplied by a single spinal nerve. There are eight cervical nerves, twelve thoracic nerves, five lumbar nerves and five sacral nerves. Each of these nerves relays sensation (including pain) from a particular region of skin to the brain. NOTE: *** Dermatomes are variable between individuals and the patter of sensory loss is usually less than the entire dermatome because of overlap. The map and landmarks presented in the Dermatomes App represent a consensus view drawn from numerous sources. ***