A minute analysis (experimental) of the various movements produced by stimulating in the monkey different regions of the cortical centre for the upper limb, as defined by Professor Ferrier/ by Charles E. Beevor.
- Beevor, Charles E.
- Date:
- 1887
Licence: Public Domain Mark
Credit: A minute analysis (experimental) of the various movements produced by stimulating in the monkey different regions of the cortical centre for the upper limb, as defined by Professor Ferrier/ by Charles E. Beevor. Source: Wellcome Collection.
Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)
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![IX. A further Minute Analysis by Electric Stimulation of the so-called Motor Region of the Cortex Cerebri in the Monkey (Macacus sinicus).* By Charles E. Beevor, M.I)., F.R.C.P., and Victor Horsley, B.S., F.R.C.S., F.R.S. (From the Laboratory of the Brown Instittttion.) Abstract received and read June 16,—Full paper received August 12, 1887. [Plates 40-42.] INTRODUCTION. In a former paper published in the ' Philosophical Transactions,' B., vol. 178 (1887), pp. 153-167, a minute account was given by us of the effects produced by electrical stimulation of the so-called motor area in the cerebral cortex for the upper limb. In continuation of this work we have investigated in a similar manner the effects produced by stimulating the rest of the so-called motor region on the convexity of the cortex, with the exception of the lower parts of the ascending frontal and parietal convolutions. The parts examined in the present research comprise the posterior third of the frontal convolutions, the upper third of the ascending frontal convolution, the superior parietal lobule, and the posterior half of the ascending parietal convolution. The movements evoked by stimulating these areas were respectively those of the head and eyes to the opposite side, conjoined movement of both opposite limbs, movements of the lower limb, and movements of the upper limb. Tn order to avoid disci^epancies in the arrangement of the cerebral sulci in different species, and so to obtain exact localisation of the effect produced, the same variety of Monkey was alone used, viz., Macacus sinicus. In all we have performed twenty- three experiments, the animal in each case having been narcotised with ether and killed before recovery from the anaesthetic. PART I.—ANATOMY. In the paper above referred to, a description was given of the position in the Monkey of the fissure of Rolando, the praecentral sulcus, and a small fissure above * The expenses of this research were defrayed by a grant from the British Medical Association. MDCCCLXXXVIII.—B. U.7.88](https://iiif.wellcomecollection.org/image/b21274022_0023.jp2/full/800%2C/0/default.jpg)
