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dermatome (durĀ“mә-tōm)   the area of skin supplied with afferent nerve fibers by a single posterior spinal root.
Anterior and posterior views of the dermatomes. Each segment is named for the principal spinal nerve serving it. V, trigeminal segments; C, cervical segments; T, thoracic segments; L, lumbar segments; S, sacral segments.

Anterior and posterior views of the dermatomes. Each segment is named for the principal spinal nerve serving it. V, trigeminal segments; C, cervical segments; T, thoracic segments; L, lumbar segments; S, sacral segments.
  the lateral part of an embryonic somite.
  an instrument for removing split-thickness skin grafts from donor sites; there are many different kinds, divided into three major types: knife, drum, and motor-driven.
 

drum dermatome  a dermatome consisting of a cylindrical drumlike apparatus coated with adhesive that rolls over the skin while a blade moves across the surface and cuts the graft free.

knife dermatome  the simplest type of dermatome, which is used to remove grafts by a freehand technique.

motor-driven dermatome  a dermatome driven by a power source; motor-driven dermatomes cut with a back-and-forth blade action.





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