Question

a 46-year-old man is diagnosed with a heart attack partly due to pain in his left upper arm. why does he experience pain in his arm?

Answer 1

The nerves that branch from the heart and those coming from the arm send signals to the same brain cells. As a result, the brain cannot isolate the source of the pain. This phenomenon, called referred pain, explains why a person experiencing a heart attack might feel arm pain without having chest pain but rather pain in the arm