Synopsis of the diastaltic nervous system / By Marshall Hall.

  • Hall, Marshall, 1790-1857.
Date:
[1850?]
Catalogue details

Licence: Public Domain Mark

Credit: Synopsis of the diastaltic nervous system / By Marshall Hall. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

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    lation remains little impaired, though it gradually and sometimes speedily subsides as the effect of withdrawing the spinal energy. 162. Exp.—We took a vigorous frog, and having carefully introduced a probe into the spinal canal, of a size to fill the whole canal or nearly so, we destroyed the entire spinal marrow and brain, leaving the probe so as to fill up the canal. In this manner all hsemorrhagy is prevented. The circulation is observed in all its vigour, only perhaps slightly diminished. In a little time, however, the rapidity of the flow of the blood begins to lessen, and especially in the arteries, which gradually enlarge and assume the appearance of veins. Is this the effect of the loss of tonicity or of ner- vous power, and a fact affording evidence in favour of the muscularity of arteries and of the influence of the spinal marrow on the arterial circulation 1 And is this peristaltic and sphincteric modification of the arterial circulation the efficient cause of secretion and of its subjection to the influence of emotion or stimulus, as in the lachrymal and salivary glands, the skin, &c. 1 163. I have only a remark or two to add in reference to the arrange- ment of the ganglionic system, given p. 24 : 164. By intra-spinal ganglionic system is meant the ganglia on the posterior roots of the trifacial and the spinal nerves. They appear to constitute the ganglionic system of the external organs—the face—the limbs. The extra-ganglionic system is that situated along each side of the spine. The arterio-ganglionic system is that distributed along and to the arteries. The intra-visceral ganglionic system is that distributed to the tissues composing the viscera, and first discovered and fully displayed, as I have stated, by Dr. Robert Lee.