Observations on the structure of the brain, comprising an estimate of the claims of Drs. Gall and Spurzheim to discovery in the anatomy of that organ / By John Gordon.

  • Gordon, John, 1786-1818.
Date:
1817
Catalogue details

Licence: Public Domain Mark

Credit: Observations on the structure of the brain, comprising an estimate of the claims of Drs. Gall and Spurzheim to discovery in the anatomy of that organ / By John Gordon. Source: Wellcome Collection.

    222/224 (page 214)
    The dark bands within the space a, b, c, are cross sections of the longitudinal bands of white substance continuous with the corpus pyramidale. In the recent subject, they are of a greyish-brown hue when so divided. The whiter parts, on the other hand, which are interposed between, and surround, these strata, consist entirely of the horizontal fibres of the protuber¬ ance, which are intimately blended along the median line a, d. e, e, Are sections of the reddish-brown substance behind the protuberance, and anterior to the fourth ventricle. The little triangular hole is a section of the top of the fourth ventricle. f} A section of the Vieussenian valve. g, g, The fibres of the anterior crura cerebelli divided a little obliquely ; in consequence of which in the indurated pre¬ paration, they always assume a paler hue than the sur¬ rounding parts, and have a similunar outline. h, h, Cross sections of the bands of fibres denominated by Reil, the Schleife. This, as well as the former figure, represent form, position, * and dimensions, with perfect accuracy. Only a general idea, however, of the differences in colour is attempted to be given, as it would be impossible to represent the minute varieties of hue without a coloured engraving. FIG. VII. Is an outline of the upper surface of the medulla oblongata when separated by a horizontal section from the annular pro¬ tuberance. It is taken from a preparation still in my posses¬ sion, on which Dr. Spurzheim, after much intreaty, was pre¬ vailed on to mark off the boundaries of the corpus pyramidale on the right side (See p. 64.)