Brachial Plexus Dermatome Map

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Brachial Plexus Dermatome Map – If you have ever wondered how the human dermatome chart is, you’ve come to the right spot. Before we move on to an image, it’s important to talk about what a dermatome actually is. What are the different kinds? Most importantly, why is it important to learn about dermatomes in order to understand our body. Continue reading to learn more. You might be surprised! Here are some examples of dermatomes.

Upper Limb Dermatome Myotome Lanyard Reference Card Brachial Plexus

What is a Dermatome?

The term “dermatome” refers to a tissue that is a part of your spinal cord. Dermatomes help physicians to build models of the cord that help in diagnosing. Two major maps are accepted by medical experts. The Keegan and Garret map and the Foerster map. The maps were designed in the 1930s and are still widely employed. The trigeminal nerve and the maxillary nerves are the two largest dermatomes.

Dermatomes are skin regions that are attached to a specific nerve. In cases of spinal cord injury, the pain could be felt in a dermatome which is innervated by that nerve. Similar to the pain that is caused by shingles outbreaks can be felt on specific spinal nerves. If you suffer from pain or neurological condition involving the dermatome, it is recommended that you visit a doctor.

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What are Some Examples of Dermatomes?

Dermatomes are the segments of skin supplied by a single spinal nerve. The nerves transmit sensory, motor, and autonomic signals. They form an element of the peripheral nervous system which connects brain and other parts of the body. Dermatomes can become affected due to a spinal lesion. When one of these dermatomes is injured, it can be easily treated with the use of a local anesthetic.

Dermatomes in the thoracic area are marked with letter-number combinations that show the relationship between the area and the sensory nerve that supplies that area. For example C1’s spinal nerve does not have a dematome, however those spinal nerves that are identified as C1-C8 and T9 refers to belly button. Dermatomes are layered in horizontally on the trunk, and dermatomes located in the extremities are usually longitudinal.

Dermatome Map

Dermatome maps are one of the common features of textbooks teaching anatomy. But, the map is inconsistency both within and inter-textbook. Its name isn’t consistent and some textbooks include different maps on different pages. This can be particularly challenging when the authors of multiple chapters do not agree on the selection of dermatome maps. The majority of textbooks utilize the diagrams drawn by Foerster, Keegan, and Garrett however, they do not provide appropriate references. Moreover, four textbooks use maps that do not have citations, such as one that cites only secondary sources.

Dermatomes are the parts of skin that receives sensory innervation from the dorsal branch of one spinal nerve. The dermatomes are not uniformly situated, but they tend to dip lower than horizontally. This is a natural variation and some tissues have more than one. Furthermore dorsal spinal nerve roots may contain intrathecal intersegmental connections with sensory neurons of those limbs that are dorsal.