S44: Injury of nerves at shoulder and upper arm level
S44.0: Injury of ulnar nerve at upper arm level
Many nerves run from the spinal cord and brain to the organs, skin and muscles in the body. Most nerves have various functions at the same time. For example, part of the nerve controls specific muscles. If this part is damaged, you may no longer be able to use that muscle strongly or at all. Another part of the nerve can be vital for sensing touch or heat on the skin.
Where exactly the symptoms appear depends on where the nerve was damaged. You have damaged your ulnar nerve. The ulnar nerve is important for hand movements. For example, the nerve is important if you want to make a fist. The nerve is also important for sensation on your hand at the side of your little finger. The nerve begins at the top, at the shoulder, and runs down to the hand. In your case, the nerve has been damaged in your upper arm.
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