The Brain as an Organ of MindAppleton, 1880 - 708 pages |
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Page 1
... an internal activity which dis- play themselves with never - failing regularity . Plants respond , however , to more definite external changes CHAPTER THE USES AND ORIGIN OF A NERVOUS SYSTEM Different kinds of Nerve Cells.
... an internal activity which dis- play themselves with never - failing regularity . Plants respond , however , to more definite external changes CHAPTER THE USES AND ORIGIN OF A NERVOUS SYSTEM Different kinds of Nerve Cells.
Page 5
... activity to the other , may be determined without any great difficulty by internal chemico - nutritive changes , whether these latter have or have not been in part induced by external influences . Such transitions from vegetal to animal ...
... activity to the other , may be determined without any great difficulty by internal chemico - nutritive changes , whether these latter have or have not been in part induced by external influences . Such transitions from vegetal to animal ...
Page 7
... activity character- istic of animal life generally . Those internal molecular movements , indeed , which are inferred to occur to a marked extent in all living matter , seem to take place in it in a pre - eminent degree . Its whole ...
... activity character- istic of animal life generally . Those internal molecular movements , indeed , which are inferred to occur to a marked extent in all living matter , seem to take place in it in a pre - eminent degree . Its whole ...
Page 8
... activity of the Amoeba being , therefore , one of the immediately determining causes of its absorbing solid food ... activities of the leaves and those of such substances by virtue of which mutual contact keeps up a state of excitation ...
... activity of the Amoeba being , therefore , one of the immediately determining causes of its absorbing solid food ... activities of the leaves and those of such substances by virtue of which mutual contact keeps up a state of excitation ...
Page 11
... activity , a tendency to undergo the first stage of organiza- tion , that is , to develop a cell - wall which imprisons the more active living matter within and causes it to under- go certain secondary modifications . Before this occurs ...
... activity , a tendency to undergo the first stage of organiza- tion , that is , to develop a cell - wall which imprisons the more active living matter within and causes it to under- go certain secondary modifications . Before this occurs ...
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Common terms and phrases
activity acts Auditory become Birds brain brain-weights Cerebellum Cerebral Hemispheres cerebral lobes Cerebral Peduncles Cerebrum commissure complex connected conscious convolutions Corpora Corpora Quadrigemina Corpus Callosum Corpus Striatum corresponding defects distinct Emotion exist external fact Ferrier Fishes fissure Fornix frontal functions ganglia ganglion grey matter higher impressions ingoing Insects Instinctive Intelligence Kin¿sthetic kind known lateral ventricles latter lesion less lower animals Medulla Medulla Oblongata ment mental Mind mode molecular motor centres movements muscles muscular nature nerve actions nerve cells nerve centres nerve fibres nervous system object Occipital Occipital Lobe Olfactory Lobes optic lobes optic nerves organs outgoing Owen parietal Peduncles Perception phenomena pineal body posterior principal processes Quadrupeds reflex regard regions relation Reptiles says seems sensations sense sensory side Smell Speech Spinal Cord stimuli structure surface tactile Temporal Lobe Thalamus third ventricle tion tissue transverse upper Vertebrates visceral Visual Volition whilst Word-Centres words Writing
Popular passages
Page 235 - Under changed conditions of life, it is at least possible that slight modifications of instinct might be profitable to a species; and if it can be shown that instincts do vary ever so little, then I can see no difficulty in natural selection preserving and continually accumulating variations of instinct to any extent that may be profitable. It is thus, as I believe, that all the most complex and wonderful instincts have originated.
Page 548 - The motion of our body follows upon the command of our will. Of this we are every moment conscious. But the means, by which this is effected ; the energy, by which the will performs so extraordinary an operation ; of this we are so far from being immediately conscious, that it must for ever escape our most diligent enquiry.
Page 154 - It would be incompatible with everything we know of the cerebral action, to suppose that the physical chain ends abruptly in a physical void, occupied by an immaterial substance; which immaterial substance, after working alone, imparts its results to the other edge of the physical break, and determines the active response — two shores of the material with an intervening ocean of the immaterial.
Page 175 - ... one, is the result. Ideas, also, which have been so often conjoined, that whenever one exists in the mind, the others immediately exist along with it, seem to run into one another, to coalesce, as it were, and out of many to form one idea; which idea, however in reality complex, appears to be no less simple than any one of those of which it is compounded.
Page 159 - Centipede be cut off, whilst it is in motion, the body will continue to move onwards by the action of the legs; and the same will take place in the separate parts, if the body be divided into several distinct...
Page 250 - Zoology (the stoparola of Ray) builds every year in the vines that grow on the walls of my house. A pair of these little birds had one year inadvertently placed their nest on a naked bough, perhaps in a shady time, not being aware of the inconvenience that followed. But...
Page 169 - ... in these modifications, a quality, a phenomenon of mind, absolutely new, has been superadded, which was never involved in, and could therefore never have been evolved out of, the mere faculty of knowledge. The faculty of knowledge is certainly the first in order, inasmuch as it is the conditio sine qua non of the others...
Page 289 - ... of Simian brains, this hiatus does not lie between Man and the man-like apes, but between the lower and the lowest Simians; or, in other words, between the old and new world apes and monkeys, and the Lemurs. Every Lemur which has yet been examined, in fact, has its cerebellum partially visible from above, and its posterior lobe, with the contained posterior cornu and hippocampus minor, more or less rudimentary. Every Marmoset, American monkey, old world monkey, Baboon, or Man-like ape, on the...
Page 6 - ... system. The red crystals turn yellow when heated, and resume their red tint on cooling. The yellow crystals obtained by sublimation retain their colour when cooled ; but, on the slightest rubbing or stirring with a pointed instrument, the part which is touched turns scarlet, and this change of colour extends with a slight motion, as if the mass were alive, throughout the whole group of crystals as far as they adhere together.
Page 327 - When asked how he could possibly learn so soon whether a particular monkey would turn out a good actor, he answered that it all depended on their power of attention. If, when he was talking and explaining anything to a monkey, its attention was easily distracted, as by a fly on the wall or other trifling object, the case was hopeless.