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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![Hallux, All toes, Small toes, Ankle, Knee, Hip. In describing the movements of each of these segments we shall give (i.) the total or absolute representation in each instance, (ii.) the primary representation, (iii.) the character of the movements comprising [a] the total or absolute representation of the part, and (b) the primary representation. By the expression total or absolute representation of any segment, we mean that we have extracted from our records every single movement of each given segment at every one of our centres where that segment happened to be represented. The summation of these facts gives correctly the actual total amount of representation of each joint at each centre, and consequently tells us to what extent, as determined by electrical stimulation, that joint or segment is represented in the cerebral cortex. The second heading under which we have classified our observations, viz., that of primary representation, requires little explanation, since, unlike the first heading just described, it defines the region in which any particular joint begins the general movement of the limb, excluding, of course, secondary, tertiary, or even quaternary representations of the segment of the limb, all these being included under the first heading. The determination of the representation of the primary movement is of the greatest importance, since upon this rests the exact localisation of the starting point of epileptiform convulsions. Finally, by the character of the movement we mean whether it be one of flexion, extension, &c, and this is separately considered, according as the movement is refer- able to (a) absolute or (b) primary representation. Representation op the Hallux (see Plate 40, figs. 6, 6a). (i.) Total or Absolute Representation.—The movements of the hallux are repre- sented * at the following centres in order of diminishing frequency :— n, {2}. {II}. {fi}. {«}, * * • 73 75 77 6' ,6, 76, r 58 \52 * The centres enclosed vertically in brackets are those in which the degree of representation was equal. MDCCCLXXXVI1I.—B. 2 F](https://iiif.wellcomecollection.org/image/b21274022_0035.jp2/full/800%2C/0/default.jpg)
