. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. 44 PHYSIOLOGY AND MORPHOLOGY OF ANIMALS. optic lobes, into which the optic roots are seen to enter. But in many cases we consciously observe and remem- ber the impressions of sight—form mental images of objects seen. In such cases the impression is sent on from the thalamus to the cerebrum. The area to which these impressions are sent—visual area—is situated in. VMpJi. Fig. 29.—Functional areas of the cerebrum : m% motor of the body ; j, sen- sory of the body ; v, visual; olf, olf
. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. 44 PHYSIOLOGY AND MORPHOLOGY OF ANIMALS. optic lobes, into which the optic roots are seen to enter. But in many cases we consciously observe and remem- ber the impressions of sight—form mental images of objects seen. In such cases the impression is sent on from the thalamus to the cerebrum. The area to which these impressions are sent—visual area—is situated in. VMpJi. Fig. 29.—Functional areas of the cerebrum : m% motor of the body ; j, sen- sory of the body ; v, visual; olf, olfactory areas; aph, motor aphasia (speech 1; , auditory aphasia; , visual aphasia (reading;; , graphic aphasia (writing). the posterior lobes and marked v. Similarly, auditory areas are marked , general sensation areas by s, gen- eral motor areas by m, and olfactory areas by olf. One of the most curious and interesting of these discoveries is that of the speech area, aph. This, of course, was discovered by observation on man—not experiments on animals. It has been long observed that there are cases in which a patient is perfectly intel- ligent and knows what he wants to say, but can not say it. Such an affection is called aphasia. In such cases it is invariably found by post mortem that there is a lesion of a particular convolution of the frontal lobe, especially of the left Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original LeConte, Joseph, 1823-1901. New York, D. Appleton and Company
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