The most beautiful thing we can experience is the mysterious.  It is the source of all true art and all science.  He to whom this emotion is a stranger, who can no longer pause to wonder…. and stand rapt in awe, is as good as dead: his eyes are closed.  – Albert Einstein

There appears to be a direct correlation between correction of a misaligned head and improved brain stem function.  This is according to Lennon Shealy et al.  1994 in the paper titled “Postural and Respiratory Modulation of Autonomic Function, Pain and Helath.”
For many years physiologists have shown that position of the head on the neck is vital because it governs all postural reflexes.  Furthermore, the authors describe if the head is mal-positioned, other parts (joints) of the body move in and out of alignment to maintain balance and counteract gravity.   Over time this leads to pain and damaged joints.  It is a definite contributing factor to hip and knee replacements.