The intracranial circulation : an essay to which was awarded the first prize of the Boylston Medical Society in 1867 / by Thomas Dwight.

  • Thomas Dwight
Date:
1867
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Licence: Public Domain Mark

Credit: The intracranial circulation : an essay to which was awarded the first prize of the Boylston Medical Society in 1867 / by Thomas Dwight. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    are not dilated in proportion : the spinal fluid can thus partly escape in this upward direction ; it flows in part into the ventricles, and a part probably beneath the arachnoid on the surface of the enceph- alon. At inspiration, the vertebral sinuses empty themselves, the fluid returns to the vertebral canal, and again occupies the vacated space.” ^ There are some cases which appear to disprove the statement that the cerebro-spinal fluid is in in- verse ratio to the blood within the cranium. These exceptions, however, are only apparent. I allude to cases in which great cerebral congestion and effu- sion have been found to coexist. Dr. John Sims, in a paper on Serous Effusion,” gave many statistics and cases from which much information on this sub- ject may be gathered.*]* Table I. contains fifty cases of persons who died of various diseases, not cerebral, and who manifested no symptoms referable to the brain, but on dissec- tion, effusion of fluid and other morbid appearances were found in the brain or membranes.” Of these fifty cases there are six in which there-was much effusion and congestion together. (There are oth- ers in which the same condition existed, to some extent, but I have taken only those in which it was * Quoted in Disorders of tlie Cerebral Circulation, by Dr. Burrows, p. 53. t John Sims on Serous Effusion from the Membranes and into the Ventricles of the Brain ; and its connection with Apoplexy and other diseases of the Brain. April 28, 1835. Medico-Chirurgical Transac- tions, Vol. XIX. p. 2G5. 3