Principles and practice of spinal adjustment; for the use of students and practitioners . pa-thetic, and from the third, fifth, sixth, seventh, ninth, tenth,and eleventh cranial nerves. Since the above nerves all communicate with the superiorcervical ganglion of the gangliated cord, and this in turnwith the upper four spinal nerves, subluxations of the upperfour cervical vertebrae will affect the meninges of the brain. 2. The fourth cervical nerves by their influence upon thecirculation of the blood in the thorax indirectly influence thecerebral blood-supply, and are therefore considered as ha
Principles and practice of spinal adjustment; for the use of students and practitioners . pa-thetic, and from the third, fifth, sixth, seventh, ninth, tenth,and eleventh cranial nerves. Since the above nerves all communicate with the superiorcervical ganglion of the gangliated cord, and this in turnwith the upper four spinal nerves, subluxations of the upperfour cervical vertebrae will affect the meninges of the brain. 2. The fourth cervical nerves by their influence upon thecirculation of the blood in the thorax indirectly influence thecerebral blood-supply, and are therefore considered as havingan influence upon the brain. 3. The suboccipital nerves affect the meninges by givingoff branches which assist in the formation of the recurrentnerve to the tentorium. 4. The lower cervical nerves, by their influence upon therespiratory movements, indirectly influence the circulation inthe brain. The expansion of the thorax in inspiration in-creases the blood-supply to this region, and thus decreases theblood-supply to the cranium. Deficient respiratory move- 118 SPINAL ADJUSTMENT. g. 14. Iaits Influenced by the FourthCervical Nerve. CRANIUM, FACE AND NECK 119 meats diminish the blood-supply to the thorax, and thereforecause a congestion in the brain. 5. The upper thoracic nerves, by sending white ramicommunicantes to the superior cervical ganglion which com-municates with all the cranial nerves, have an influence uponthe functional activity of the brain. From the superior cervi-cal ganglion impulses are transmitted by the gray rami tothe cranial nerves, the rami then accompanying the cranialnerves from their origin outward to their entire distribution. 6. The lower thoracic nerves, by reason of their communi-cation with the phrenic nerves, have an indirect, but decided,influence upon the circulation of the brain. The Innervation of the Eye.—The innervation of the eyeboth direct and indirect, is of the greatest importance, sinceclinical experience bears out the fact that,
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