Copy 2

The physiognomical system of Drs. Gall and Spurzheim; founded on an anatomical and physiological examination of the nervous system in general, and of the brain in particular; and indicating the dispositions and manifestations of the mind / Being at the same time a book of reference for Dr. Spurzheim's demonstrative lectures.

  • Spurzheim, J. G. (Johann Gaspar), 1776-1832
Date:
1815
Catalogue details

Licence: Public Domain Mark

Credit: The physiognomical system of Drs. Gall and Spurzheim; founded on an anatomical and physiological examination of the nervous system in general, and of the brain in particular; and indicating the dispositions and manifestations of the mind / Being at the same time a book of reference for Dr. Spurzheim's demonstrative lectures. Source: Wellcome Collection.

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    in what is called the anterior fold of the corpus cal- losum. ‘The anterior and posterior folds of the cor- pus callosum are adapted to the cavities which ex- tend between the inferior and superior convolutions of the posterior and anterior lobes. COMMISSURES OF THE SUPERIOR CONVOLUTIONS OF THE BRAIN. All the superior convolutions of both hemispheres of the brain have their uniting fibres in the great commissure or in the corpus callosum (PJ. II. fig. 2. ~pa). This commissure, as well as all the rest, must be proportionate to the size of the parts from which it is produced. ‘Therefore it is much smaller in sheep, dogs, oxen, &c. than in man. As both hemispheres of the brain are separated both behind and before, the uniting fibres of the convolutions, be- tween these separations, cannot join in a transverse direction, but the uniting fibres of the posterior convolutions run forward and inward, and those of the anterior convolutions run backward and inward. On this account also, the uniting fibres are more - numerous at both extremities of the corpus cal- losum; and, as the posterior separation of the hemispheres is more considerable than the anterior, the posterior extremity of the corpus callosum is also thicker. - In the middle region, however, of the corpus callosum, the direction of the uniting fibres is transverse. Anatomists are wrong in maintaining that birds