J.Jpn. Surg. Soc.. 58(11): 1791-1808, 1958
EXPERIMENTAL STUDIES ON THE PERIARTERIAL AFFERENT PAIN-CONDUCTING PATHWAY
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I. Department of Surgery, Kobe Medical College (Director: Prof. N. Fujita) Hiroya KOKUGA |
2) The spike conducted from the perivascular nerves measures 20-80μv in height, 3-10 ms in width with 500 ms time constant, and the velocity of conductivity was 3-15 m/sec.
3) The afferent excitement conducted through the peri-aortic nerve are directed against the arterial blood flow to a certain direction along the arterial wall for a certain period of time. Some of these impulses may reach the area of the aortic arch but will not be convoyed to the peripheral site beyond the aortic arch. The pain or other sensory stimuli which is not strong enough to invite Cannon's sign is conducted to the afferent and efferent pathways at the junction of the established peri-aortic autonomic nerve plexus and displays several internal receptive reactions. Therefore, the vasomotor nerve is supplied majorly by segmental innervation, while on the other hand, the vaso-sensory nerve has non-segmental innervation except for a small portion that recieves segmental innervation grossly.
4) Such peri-aortic sensory conducting pathway, when compared with the established autonomic sensory conducting pathway, has an individuality and complexity when pain sensation alone is considered. Stimuli applied to the arterial system are conducted through the periarterial wall, whereas, the stimuli supplied to the established autonomic nervous system are conducted through the nerve system. However, these two different conducting pathways normally communicate at the point of contact and a complex conduction is established. This tendency is markedly increased, if this pathway is damaged centric to the point of contact.
5) When a stimuli is applied to the arteries and its peripheral tributaries and an afferent stimul aroused in the established autonomic nervous system, the pain stimuli is conducted to a greater extent during the maximal stage of excitement in the arterial .system than in the autonomic nervous system.
(author's abstract)
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