12/9/2023 0 Comments Woman torso drawingRemember that the exact area that a dermatome may cover can vary by individual. Below, we’ll outline each dermatome and the area of the body that it’s associated with. Your dermatomes are numbered based on which spinal nerve they correspond to. In general, dermatomes associated with your limbs run vertically along the long axis of the limbs, such as down your leg. This is due to the shape of the limbs as compared with the rest of the body. The dermatome pattern in the limbs is slightly different. When viewed on a body map, they appear very much like stacked discs. Some overlap between neighboring dermatomes may also occur.īecause your spinal nerves exit your spine laterally, dermatomes associated with your torso and core are distributed horizontally. The exact dermatome pattern can actually vary from person to person. As a result, dermatomes begin with spinal nerve C2.ĭermatomes have a segmented distribution throughout your body. This is because the C1 spinal nerve typically doesn’t have a sensory root. You may have noticed that this is one less than the number of spinal nerves. These nerves transmit sensations, such as pain, from a specific area of your skin to your CNS. This pair of nerves originates from the area of your coccyx, or tailbone.Įach of your dermatomes is associated with a single spinal nerve. You only have a single pair of coccygeal spinal nerves. They’re associated with your sacrum, which is one of the bones found in your pelvis. Like the lumbar spinal nerves, you also have five pairs of sacral spinal nerves. They come from the part of your spine that makes up your lower back. There are five pairs of lumbar spinal nerves, designated L1 through L5. They originate in the part of your spine that makes up your torso. You have 12 pairs of thoracic nerves that are numbered T1 through T12. There are eight pairs of these cervical nerves, numbered C1 through C8. Spinal nerves are named and grouped by the region of the spine that they’re associated with. They form nerve roots that branch from your spinal cord. Your PNS works to connect the rest of your body with your CNS, which is made up of your brain and spinal cord. Spinal nerves are part of your peripheral nervous system (PNS). Let’s take a closer look at both of these components of the body. Each of your dermatomes is supplied by a single spinal nerve.
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