On dilatation of the pupil from stimulation of the cortex cerebri / by J. Herbert Parsons.

  • Parsons, John Herbert, Sir, 1868-1957.
Date:
1901
Catalogue details

Licence: In copyright

Credit: On dilatation of the pupil from stimulation of the cortex cerebri / by J. Herbert Parsons. 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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    ON DILATATION OF THE PUPIL FROM STIMULA- TION OF THE CORTEX CEREBRI. By J. HERBERT PARSONS, B.Sc., F.R.C.S., Research Scholar of the British Medical Association. (Two Figures in Text.) (From the Physiological Laboratory, University College, London.) CONTENTS. I. Historical. II. Method. III. Localisation—(a) Cat, (b) Dog, (c) Monkey. IV. Effect of Section of the Cervical Sympathetic. V. Effect of Section of the III. nerve. VI. Effect of Section of the Corpus Callosum. VII. Effect of Stimulation of the Corona Badiata and Internal Capsule. VIII. Criticism and Conclusions. IX. Summary. Bibliography. Appendix. I. History. Several previous observers have noticed dilatation of the pupil following excitation of various parts of the cerebral cortex. Bochefontaine® (1875) was the first to record the fact as the result of experiments upon dogs. He showed that it might occur when the animals were curarised. Luciani and Tamburini® observed both dilatation and con- striction in some of their experiments. Ferrier® confirmed these results, and added further details; thus, indicating the spots stimulated by numbers, he makes the following statements:—In monkeys, “ (12) Including the posterior half or two- thirds of the superior and middle frontal convolutions, the eyes widely open, the pupils dilate, and head and eyes turn to the opposite side.” “ (13) and (13a) On the anterior and posterior limb of the angular gyrus respectively the eyes move to the opposite side usually also the pupils become contracted.” “(14) On the superior temporo-