On the descending degenerations which follow lesions of the gyrus marginalis and gyrus fornicatus in monkeys / by E.P. France ; with an introduction by Professor Schäfer.

  • France, E.P.
Date:
1889
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Licence: Public Domain Mark

Credit: On the descending degenerations which follow lesions of the gyrus marginalis and gyrus fornicatus in monkeys / by E.P. France ; with an introduction by Professor Schäfer. 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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    VIII. On the Descending Degenerations which follow Lesions of the Gyrus MarginaMs and Gyrus Fornicatus in Monkeys. By E. P, Feance. With an Introduction hy Professor Schaeer, F.R.S. {From the Physiological Laboratory, University College, London.) Received March 9,—Read March 28, 1889. [Plates 27-29.] INTRODUCTION. The following paper contains the record of an investigation into the degenerations which follow lesions of the gyrus marginalis and gyrus fornicatus in Monkeys. The work has been carried on under my direction by Mr. France, with the aid of a grant from the Government Grant Fund, and represents part of a long investigation into the degenerations which follow artificially produced cerebral lesions, the material for which has been furnished by cases operated upon in conjunction respectively with Professor V. Horsley and Hr. Sanger Brown. These cases and the physiological results of the operations have already been published in the ‘ Philosophical Trans- actions.’' The experiments here dealt with, twelve in number, comprise only the lesions of the gyrus marginalis and gyrus fornicatus, and, with one exception (case 12), are taken from the series of experiments performed in conjunction with Mr. Horsley, t Of the twelve cases, six were of removal, or attempted removal, of the gyrus mar- ginalis, and six of removal, or attempted removal, of the gyrus fornicatus. But in only one or two instances was the lesion, as determined by post-mortem examination, exactly limited to the convolution which it was attempted to remove, for in most cases the adjacent gyrus was to a certain extent involved in the injury. This was especially the case when removal of the gyrus fornicatus had been attempted, on account of its deep situation, and the difficulty of getting at it without some manipulation of the superjacent gyrus. Nevertheless, the removal of one or the other * V. Horsley and E. A. Schafer, “ A Record of Experiments on the Functions of the Cerebral Cortex,” ‘ Phil. Trans,’ B, 1888, pp. 1-45 ; and Sanger Brown and E. A. Schafer, ‘ Phil. Trans.,’ B, 1888, pp. .303-.327. t In an Appendix, which has been added subsequently, lesions of the external motor cortex are dealt with by Mr. France. MDCCCLXXXIX. B. 2 U 2 15.1.90