Elements of phrenology / [George Combe].

  • George Combe
Date:
1850
Catalogue details

Licence: Public Domain Mark

Credit: Elements of phrenology / [George Combe]. Source: Wellcome Collection.

    73/250 page 55
    fe pe OF THE SKULL AND THE BRAIN. OO pass into the great ganglion of the middle and posterior lobes, commonly, but erroneously, named the optic ¢ha- lami, and ultimately constitute part of the posterior lobes of the brain.—(Solly on the Brain, p. 233 ; Spurzheim’s Physiog. System, p. 38.) Finally, a number of fibres proceed from the lower extremity of the corpora pyramidalia, near the point of decussation, accompanied by a number of fibres which originate in the anterior or motory tract of the spinal cord, immediately below said point, to the cerebellum.— (Solly on the Brain, p. 155; and his Plate vi., Fig. 1.) The fibres of the corpora pyramidalia thus constitute the great mass of the anterior lobes; and enter into the substance of the middle lobes ; into that of the pos- terior lobes ; and into that of the cerebellum. The corpora olivaria (8. of Fig. 1), and corpora res- tiformia (t t of Fig. 1), are placed at the summit of the posterior-lateral columns of the spinal cord, which are devoted to sensation. The corpora olivaria pass up- wards under the pons Varolii, and form the posterior and interior parts of the crura; thence they proceed through the great posterior ganglion (thalami: nervorum optico- rum), and then expand partly into the convolutions of the anterior lobe, lying on its superior surface, towards the mesial line, partly into the superior convolutions towards the mesial line of the middle lobe; but chiefly into the convolutions of the posterior lobes.—(Gall, Physiologie du Cerveau, tome 1., p. 281.) Sir Charles Bell says, that the fibres of the middle- lateral columns decussate at the same point as that at which the corpora pyramidalia decussate. he fibres of the corpora restiformia ascend and form the chief part of the cerebellum ; but a portion of them proceeds still upwards, and enters into the composition of the posterior lobes of the brain. In the centre of the crus cerebri, the fibres of the motory tract (D in Fig. 38) are separated from the fibres of the sensory tract to the left of the letter C in
    digitised image 1
    digitised image 2
    digitised image 3