https://www.atlantotec.com/en/fundamentals/autonomic-nervous-system
If the top two bones in the neck are out-of-alignment or not moving well from sustained head-tilting and repetitive head movements the nerves that pass through the area over stimulate the adjacent nerves can cause: stomach upset, heart palpitations, fatigue, sleep disorders, irritability, upper neck stiffness and pain and headache and migraine.
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