Why does the Horner’s syndrome happen?

 Some smooth muscles that we can’t control voluntarily are controlled by both the parasympathetic and sympathetic nervous system.  Others only have one or the other. …

What is Horner’s Syndrome?

This syndrome is temporary and results from the decreased output of the sympathetic nervous system to your brain, face, head, neck, arms, and chest.  It…

What about the vagus nerve?

The vagus nerve is part of our parasympathetic (PNS). It modulates the immune system and inflammation. When it’s not working like it should, we see…

What is the autonomic nervous system?

This part of our nervous system handles all of the automatic functions that we don’t even think about such as digestion of food, stimulating the…