Mill Creek Keto  For chiropractors, specifically ones that focus on the Upper Cervical spine, this theory can be a beautiful explanation for how we impact the lives of these patients. But instead of affecting the larger jugular vein, the structure of the neck can be affecting the smaller veins within the skull. When the structural alignment of the head and neck are lost, it can affect the small veins inside of the head that are responsible for draining used blood from the nervous system. When this old blood gets sluggish and backed up from the chronic misalignment, then old blood and cerebral spinal fluid can begin to create damage to these sensitive nerve cells.