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action activity adult animal appear become behavior birth body brain branches cause changes cilia close color comparative complete conclusion connection continuous cord course cytoplasm dark degeneration described determine direction dorsal effect electric elements embryo epithelium evidence experimental experiments fact fascicle fibrillae figures finds frog function give given granules guinea pig important increase indicated individuals later less light means medullated method move movements muscle nature nerve cells nerve fibers nervous system normal nucleus Number of nerve observations obtained occurs olfactory organs origin pass path period peripheral position possible preparations present probably problem produced reaction region relation roots seems seen sense sheath shown side species spinal stage stain stimulus structure substance surface swimming TABLE theory tion turn usual ventral
Page 281 - The Eyes of the Blind Vertebrates of North America. V. The History of the Eye of the Blind Fish Amblyopsis from Its Appearance to its Disintegration In Old Age. Mark Anniversary Volume (New York.
Page 531 - A Final Report on the Crustacea of Minnesota Included in the Orders Cladocera and Copepoda. Together with a Synopsis of the described Species in North America and Keys to the known Species of the more Important Genera.
Page 433 - My thesis now is this : that, when we think of the law that thought is a function of the brain, we are not required to think of productive function only ; we are entitled also to consider permissive or transmissive function. And this the ordinary psycho-physiologist leaves out of his account.
Page 289 - ... reacts positively to large patches of bright sunlight rather than to small ones, even though the latter, as in the case of the sun, may be much more intense.
Page 77 - Thorndike ( 1914) , an eminent proponent of this view, wrote that the mind must be regarded not as a functional unit, nor even as a collection of a few general faculties which work irrespective of particular material, but rather as a multitude of functions each of which involves content as well as form, and so is related closely to only a few of its fellows, to the others with greater and greater degrees of remoteness (p.
Page 380 - Mass., at the Biological Laboratory of the Brooklyn Institute of Arts and Sciences at Cold Spring Harbor, Long Island, at Ogunquit, Maine, and at Randolph, NH I wish to express my obligations to Dr.
Page 16 - I have found in the case of all puppies, and several other kinds of animals examined, that even on the first day of birth they will not creep off a surface on which they rest, if elevated some little distance above the ground. When they approach the edge they manifest hesitation, grasp with their claws or otherwise attempt to prevent themselves falling, and, it may be, cry out, giving evidence of some profound disturbance in their nervous system.
Page 76 - The answer which I shall try to defend is that a change in one function alters any other only in so far as the two functions have as factors identical elements. The change in the second function is in amount that due to the change in the elements common to it and the first. The change is simply the necessary...
Page 77 - Improvement in any single mental function need not improve the ability in functions commonly called by the same name. It may injure it. Improvement in any single mental function rarely brings about equal improvement in any other function, no matter how similar, for the working of every mental function-group is conditioned by the nature of the data in each particular case.