Using a dermatomal map, predict the possible site of nerve damage in a patient suffering from loss of sensation in the left hand.Multiple ChoiceC2–C4T1–T4T5–T8C6–C8
Question
Using a dermatomal map, predict the possible site of nerve damage in a patient suffering from loss of sensation in the left hand.Multiple ChoiceC2–C4T1–T4T5–T8C6–C8
Solution
The dermatomal map is a tool used to understand the areas of the skin innervated by the sensory fibers of a specific spinal nerve root. In the case of loss of sensation in the hand, we would look at the areas of the body that are innervated by the nerves that also supply the hand.
The hand is primarily innervated by the C6, C7, and C8 nerve roots, with some contribution from T1. Therefore, if a patient is experiencing loss of sensation in the hand, it is likely that there is damage to the C6–C8 nerve roots.
So, the answer is C6–C8.
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