A comparative view of the sensorial and nervous systems in men and animals / By John C. Warren.

  • Warren, John Collins, 1778-1856.
Date:
1822
Catalogue details

Licence: Public Domain Mark

Credit: A comparative view of the sensorial and nervous systems in men and animals / By John C. Warren. Source: Wellcome Collection.

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    2k ferior part extends the medulla oblongata...The, hemispheres of the cerebrum contain two lateral, ventricles with an intervening septum; under the thalami-is a third ventricle, and a fourth in the. cerebellum, all of which communicate together, asin man. © There is no corpus callosum nor cor- a pora mamellaria, nor do we see the tubercula quadrigemina between the cerebrum and _ cere- bellum; but there are four tubercles placed, be~ tween the thalami and. corpora striata. The anterior part of the cerebrum is prolonged into the olfactory nerve, thus forming in this part a _ third degree in the scale from man; for. in- the human head, the olfactory nerves are. distinct from the brain: in quadrupeds the brain swells into.an olfactory tubercle; and in birds the hemis- phere is prolonged into the olfactory nerve. The optic tubercles or thalamiin birds are remarkable for possessing ventricles as the olfactory nerves doin quadrupeds.. These facts would lead us to expect what we find to be true, an extraordinary development of the organ of smell in quadrupeds, and of that of vision in birds. c Inthe third class, the neprines, or amphibi- - ous animals, the structure of the brain is varied in the four different orders of Turtles, Frogs, Lazards and Serpents. The following characters are common to the four orders. ‘There isa cere- brum with proper hemispheres, but no convolu- tions;/a cerebellum and a medulla oblongata ; - — oe