Keyword Analysis & Research: what is a dermatome pattern

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What is a dermatome?

A dermatome is an area of skin that is mainly supplied by a single spinal nerve. There are 8 cervical nerves (note C1 has with no dermatome), 12 thoracic nerves, 5 lumbar nerves and 5 sacral nerves. Each of these spinal nerves relay sensation from a particular region of the skin to the brain. [1] [2] The nerves from the

What is the dermatome pattern in the limbs?

Because your spinal nerves exit your spine laterally, dermatomes associated with your torso and core are distributed horizontally. When viewed on a body map, they appear very much like stacked discs. The dermatome pattern in the limbs is slightly different. This is due to the shape of the limbs as compared with the rest of the body.

What causes symptoms in the dermatome?

[1] Dysfunction or damage to a spinal nerve can trigger symptoms in the corresponding dermatome. Nerves damage or dysfunction may result from infection, compression, or traumatic injury [2].

Why do dermatomes overlap?

This is why the term “dermatome” refers to the segmental innervation of the skin. Neighboring dermatomes often, if not always overlap to some degree with each other, as the sensory peripheral branches corresponding to one posterior root typically go beyond the limit of their dermatome.


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