Principles and practice of spinal adjustment; for the use of students and practitioners . e respective organs which theysupply. Since the nervous system is continuous throughout itsentire course, it follows that each system, organ, and part ofthe body derives its nerve-supply through the medium of thespinal cord and the spinal nerves which, given ofif from it,emerge through the intervertebral foramina. It is at thispoint that the reflex arc is situated by which the body is keptin harmony with the external influences which afifect it. Anyinterference with the proper action of this arc will caus
Principles and practice of spinal adjustment; for the use of students and practitioners . e respective organs which theysupply. Since the nervous system is continuous throughout itsentire course, it follows that each system, organ, and part ofthe body derives its nerve-supply through the medium of thespinal cord and the spinal nerves which, given ofif from it,emerge through the intervertebral foramina. It is at thispoint that the reflex arc is situated by which the body is keptin harmony with the external influences which afifect it. Anyinterference with the proper action of this arc will causedisharmony and disease. As has been previously shown, vertebral subluxations will,by destroying the conductivity of the nerves at this point,deprive the corresponding parts of the body of the nerve-impulses necessary to their functional activity and organicintegrity. It is for this reason that we will consider in thisconnection the parts of the body supplied by the nerve fromeach segment of the spine, and all its ramifications, 111 112 SPINAL ADJUSTMENT fikin ofF<»,ce a,/ttl HecK. Fig. 11. Parts Influenced by the FirstCervical Nerve. CRANIUM, FACE AND NECK 113 The Innervation of the Scalp.—The innervation of thescalp is derived from the following nerves: 1. The posterior auricular, which is a branch of the facialwhich communicates with the sympathetic on the middlemeningeal artery by the external superficial petrosal nerve;this in turn communicates with the superior cervical ganglion. 2. The great auricular nerves, the branches of origin ofwhich communicate with the second and third pairs of cervicalnerves, and send branches to the region of the scalp aboutthe ears. 3. The suboccipital nerves, which are the first pair ofspinal nerves and emerge from the vertebral canal throughthe posterior condyloid notches between the occipital boneand the posterior arch of the atlas on each side. These nervessupply a greater portion of the scalp than any others, sendingbranches to the
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