The sole artery in the brain that supplies oxygen is the vertebral artery, which travels from the heart to the first cervical vertebra, which supports the occipital bone, the sixth cervical vertebra, the foramen of the cervical vertebrae, and the subclavian artery. Through the foramen magnum, it provides blood to the cerebellum and cerebrum as well as the sympathetic ganglion's nerve fibers, which are part of the autonomic nervous system. Serious cerebrovascular disease may result from deformity of the cervical vertebrae's curve, which can also influence the basilar artery and the circle of wills, compress the vertebral artery, and decrease blood circulation. 

According to these anatomical principles, by encouraging smooth blood flow, using the Cure Pillow to support the neck's natural C curvature as you sleep will help avoid and alleviate symptoms.