Dermatome Chart C6

Dermatome Chart C6The term “dermatome” is a combination of 2 Ancient Greek words; “derma” indicating “skin”, and “tome”, implying “cutting” or “thin sector”. It is an area of skin which is innervated by the posterior (dorsal) root of a single back nerve. As posterior roots are organized in sectors, dermatomes are. This is why the term “dermatome” describes the segmental innervation of the skin.

Dermatome Chart C6

Dermatomes Diagram Spinal Nerves And Locations – Dermatomes Diagram Spinal Nerves And Locations

Neighboring dermatomes typically, if not always overlap to some degree with each other, as the sensory peripheral branches representing one posterior root generally exceed the limit of their dermatome. As such, the thin lines seen in the dermatome maps are more of a scientific guide than a genuine boundary. Dermatome Chart C6

This suggests that if a single spine nerve is impacted, there is most likely still some degree of innervation to that segment of skin originating from above and below. For a dermatome to be totally numb, usually 2 or 3 neighboring posterior roots require to be affected. In addition, it’s important to note that dermatomes are subject to a big degree of interindividual variation. A visual representation of all the dermatomes on a body surface chart is referred to as a dermatome map. Dermatome Chart C6

Dermatome maps

Dermatome maps portray the sensory circulation of each dermatome across the body. Clinicians can examine cutaneous feeling with a dermatome map as a way to localize lesions within main anxious tissue, injury to specific spinal nerves, and to figure out the degree of the injury. Several dermatome maps have been established throughout the years but are frequently contrasting.

The most typically used dermatome maps in major books are the Keegan and Garrett map (1948) which leans towards a developmental interpretation of this idea, and the Foerster map (1933) which correlates much better with medical practice. This article will examine the dermatomes using both maps, recognizing and comparing the major distinctions in between them.

Why Are Dermatomes Important?

To understand dermatomes, it is important to understand the anatomy of the spine. The spine is divided into 31 sections, each with a pair (right and left) of anterior and posterior nerve roots. The kinds of nerves in the anterior and posterior roots are various.

Anterior nerve roots are accountable for motor signals to the body, and posterior nerve roots receive sensory signals like discomfort or other sensory symptoms. The posterior and anterior nerve roots combine on each side to form the spinal nerves as they exit the vertebral canal (the bones of the spine, or foundation).