Do the cerebellum and the oblongata represent two encephalic segments or only one? : abstract / by Burt G. Wilder.

  • Wilder, Burt G. (Burt Green), 1841-1925.
Date:
[1885]
Catalogue details

Licence: Public Domain Mark

Credit: Do the cerebellum and the oblongata represent two encephalic segments or only one? : abstract / by Burt G. Wilder. 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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    The existence and dorsal circumscription of the porta (foramen of Monro) in the adult human brain. By Prof. Burt G. Wilder, Cornell University, Ithaca, N. Y. [ABSTRACT]. In a paper, On the foramina of Monro in man and the domes- tic cat, presented to the Association at the Boston meeting in 1880, it was stated (1) that no recent writer had denied the ex- istence of a communication between each proccele (lateral ven- tricle) and the aula (cephalad part of the third ventricle ) ; (2) that I had not yet had the opportunity of examining the parts upon a properly prepared human brain, but the imperfect materials at my disposal indicated that the relations are essentially the same as in the cat. Since then, however (1) I find that, at the Societe de Biol- ogie, May 14 and June 21, 1879, Prof. Matnias Duval declared that when one finds a communication between the middle and lateral ventricles in an adult human brain, it results from an artificial perforation ; (2) I have been able to determine the ex- istence and dorsal boundary of the porta in all the human brains examined for the purpose, including several adult as well as fetal and young. Some of these, like the specimen exhibited, were prepared by the process of continuous, ccelian alinjection (alcoholic injection) described by me at the last meeting of The Society of Naturalists of the Eastern United States, and in The New York Medical Journal, March 1, 1884. The photographs (taken by Prof. S. H. Gage) here shown are believed to be the first ever made of the foramen of Monro ; in the enlarged one the orifice is seen to be bounded caudad by the thalamus, cephalad by the lbrnicolumn, ventrad by the continuity of the two, and dorsad by the endyma reflected from the parts named upon the intruded portiplexus. As has been repeatedly stated by me, this demonstration of the dorsal limit of the porta is equally a demonstration of the ventral limit of the rima ( great transverse fissure) with which the porta is usually, but erroneously, made continuous in both figures and descriptions.1 1 Since this p;iperwas presented, I have been enabled to see the same points to even better advantage upon an alinjected hydrencophal (hydrocephalus brain), shown at the meeting Of the Am. Neurological Assoc., June 18, 1885.