Question here is really where does the referred pain come from? And there are two types of referred pain. One, we call somatic referred pain. And it's just because when we develop as an embryo, two tissues that were close together when we were embryos can end up separated.
And so you can have nerves, a nerve pathway that's that sort of split. And if you have a signal coming from here, rejoining with those that come from here, your brain at the top doesn't know whether that message started here or over here.
So you might just feel it here or you might feel it in both, or you might feel it over here. And I guess, we don't really know, but I guess the brain's making some decisions, some best guesses at this end about whether the message started here or here.
So, I mean, the most common example of that is a heart attack, right? People tend to feel it in their right shoulder, right side of their their neck. But the the tissue that's, that the signals are coming from, of course, is the is the heart.
And so, you know, people have tried to map out referral patterns that will come up in trigger point textbooks and things because there's a certain degree of consistency between people. It is variable, but there's a certain degree of consistency like the heart fairly consistently refers to the shoulder and neck.
So that's that one. And that's the kind, that's like, normal. Nothing. Nothing to worry about there. The other is if there's some pathology in along a nerve itself. A message can start partway along the nerve. So normally signals the things in the tissues are only detected by the ends of the nerve and then a message propagates from there. But if there is some compression and some changes in the nerve partway along, the message can start partway along. But the brain still thinks it started at the at the nerve endings.