Lectures of the diagnosis of diseases of the brain / by W. R. Gowers.
- William Richard Gowers
- Date:
- 1885
Licence: Public Domain Mark
Credit: Lectures of the diagnosis of diseases of the brain / by W. R. Gowers. Source: Wellcome Collection.
Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.
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![MOTOR CENTRES. posterior parts of tlie first and second frontal convolutions. These are not only unconfirmed so far as the liuman brain is concerned, but tbe balance of evidence is against their existence.* This region of the cerebral cortex is certainly motor, but it is certainly also not exclusively motor. Its destruction by disease causes persistent paralysis, corresponding in distribu- tion to the part destroyed; irritation of it causes convulsions, that begin in the limb corresponding to the part irritated. Fig. 4.—Cortical Centres : Left Hemisphere. The position of the limb-ceuti-es is indicated by the letters composing their names. T, tongne-centre. The dotted line encloses the motor speech- centre. F L, frontal lobe ; P L, parietal lobe ; 0 L, occipital lobe ; T L, temporal lobe; /. R, fissure of Rolando ; f.s.a., anterior limb of the fissure of Sylvius ; f.s.]}., posterior limb of the same fissure ; p.o.f., parieto-occipital fissure. But destruction of these parts causes also some loss of sensation, chiefly in the extremity of the limb most paralysed, and accompanied by an inability to recognize the position of the extremity, hand or foot—an inability which may be out of all proportion to the loss of cutaneous sensibility, and even, strangely enough, may exist alone. Of this peculiar * Schiifer and Horsley find, in. monkeys, centres for the trunk muscles in the highest part of the motor region (especially on the inner aspect), and in the posterior part of the first frontal convolution. Ferrier found centres for the movement of the head and eyes on the first and second frontal.](https://iiif.wellcomecollection.org/image/b21517125_0023.jp2/full/800%2C/0/default.jpg)
