Why Do Heart Attacks Cause *Arm* Pain?

The video explains why people often feel pain in their left arm during a heart attack, despite the heart being in the chest. It describes how pain signals travel from the skin to the brain through a chain of nerve cells, and how the brain interprets these signals. The sensory cortex is responsible for processing pain from most body parts, but not internal organs. This leads to referred pain, where organ pain is felt in different body parts due to nerve pathway merging. The video concludes by highlighting the need for further research to better understand and map these pain pathways.

What new insight or understanding did you gain from this video?