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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    Z Stimulate sigmoid=slight dilatation. Stimulate post-supra-sylvian = dilata- tion to>h, R. ear pricked up. 12.4 Stimulate sigmoid = eyes to opp. side, both dilate; nystagmus increased in range and frequency. ******* 12.10 R. symp. pulled out as high as possible. 12.12 Pupils R.=nearly L. = £: stimulate sigmoid, R.=nearly J, L. = fully | : stimulate post-supra-sylvian=ditto. Exp. XIX. Cat. Ether. R. supr. cervical gang, excised, R. X intact, L. X and symp. divided. L. frontal cortex exposed. P.M. 4.30 R.=£, L. slightly larger : stimulate L. sigmoid = dilatation of both. 4.40 Deeply antesthetised, both = £ : stimulate sigmoid=nil. 4.44 Pupils, R. = Ir, L. slightly larger. Stimulate sigmoid, R. =f, L. very slight dilatation, R. orbicularis palpebrarum contracts. 4.48 Repeat = ditto. 4.50 No reaction to strong electric light in either (£). 4.52 Pupils ^ : stimulate sigmoid = i, both. Exp. XX. Large cat. Ether. This cat gave very good localisation results. It is mentioned because the cerebellum was exposed and the L. lateral lobe stimulated. The eyes moved to the same side, and the pupils dilated from j to This was repeated in another cat with the same result. Exp. XXIX. Cat. A.C.E., then ether. R. vago-symp. cut, L. symp. cut. Post-pt. of L. cortex and cerebellum exposed. L. V cut. P.M. 2.0 Stimulate post-supra-sylvian=dilatation from J to £. 2.3 Pupils equal. Coil at 7 ; stimulate post-supra-sylvian = eyes to R. and up, dilatation to f, no body movements. 2.4 Coil 13. Repeat=slight dilatation, no movements. 2.5 Coil 11. Repeat = dilatation from | to J, eyes to R. 2.7 Repeat = ditto. Stimulate ant. part of post-supra-sylvian = nil. 2.8 Repeat = ditto. ******* 2.13 Pupils equal, l; stimulate median ecto-sylvian = nil. Coil 10. Stimulate median ecto-sylvian =• eyes up, slight dilatation. Stimulate post-supra- sylvian = wide dilatation. ******* 2.25 Stimulate L. conjunctiva=nil: stimulate R. conjunctiva=dilatation of both to £. 2.2/ Repeat=ditto. 2.30 Repeat=ditto. Dilatation very slow but marked. 2.31 Pupils £ A.C.E. on—pupils gradually contract under influence of chloroform. ******* 2.40 Stimulate internal capsule = no effect, except from post, part=strong con- vergence of eyeballs and both pupils contract very markedly. [The Y. nerve was completely divided.]