The Journal of Comparative Neurology and Psychology, Volume 20Editorial Office, Denison University, 1910 |
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Page 52
... nucleus of origin of the olfactory neurones of the first order lies peripherally in the ol- factory epithelium . Since that time his results have been con- firmed by various workers repeatedly . Bedford ( '04 ) gives a brief summary of ...
... nucleus of origin of the olfactory neurones of the first order lies peripherally in the ol- factory epithelium . Since that time his results have been con- firmed by various workers repeatedly . Bedford ( '04 ) gives a brief summary of ...
Page 62
... nuclei in its course . In one preparation of this stage a very small cavity can be made out near the center of the placode . This cavity is not connected with the outside , but lies a little nearer the lateral side of the placode ...
... nuclei in its course . In one preparation of this stage a very small cavity can be made out near the center of the placode . This cavity is not connected with the outside , but lies a little nearer the lateral side of the placode ...
Page 63
... nuclei so that it does not seem possible that any nuclei are migrating from the neural tube into the nerve . The olfactory capsules remain closed in this series of embryos until about thirty hours after hatching , although slight ...
... nuclei so that it does not seem possible that any nuclei are migrating from the neural tube into the nerve . The olfactory capsules remain closed in this series of embryos until about thirty hours after hatching , although slight ...
Page 64
... nuclei and the fiber zone devoid of neuroblasts just inside the neural tube . Stain as above . X 400 . the middle of the spread of the fibers into the nasal capsule , and causes the capsule to appear flattened laterally . The thin nasal ...
... nuclei and the fiber zone devoid of neuroblasts just inside the neural tube . Stain as above . X 400 . the middle of the spread of the fibers into the nasal capsule , and causes the capsule to appear flattened laterally . The thin nasal ...
Page 65
... nuclei appear to be nuclei of indifferent cells that are migrating along the olfactory nerve . Probably they are of the same general nature as the nuclei producing the susten- tacular cells of the nasal epithelium . Later the larger ...
... nuclei appear to be nuclei of indifferent cells that are migrating along the olfactory nerve . Probably they are of the same general nature as the nuclei producing the susten- tacular cells of the nasal epithelium . Later the larger ...
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Common terms and phrases
adult Ameiurus Amia Amphibia Anat animal anlagen aorta appear arise artery auditory vesicle brain Cajal caudad cells migrating cent cerebral cervical commissure COMPARATIVE NEUROLOGY connection cortex cutaneous diameter diencephalon differentiated distal dorsal dorso-lateral embryo epibranchial placode epidermis evaginated figures foramen forebrain frog ganglion cells Gasserian give rise Golgi hemisphere hippocampi internodes IXth lateral line lateral line organs lateral mass lateralis VIIth length mammals median medullated membrane mesectoderm migrate peripherally mouse nasal capsule nerve cells nervus terminalis neural crest neural tube NEUROLOGY AND PSYCHOLOGY neurones nucleus observed olfactory bulbs olfactory nerve origin pars percentage of water placode portion postauditory placode preauditory placode prevertebral plexuses primordium hippocampi region relation roots sensory spinal cord spinal ganglia spinal nerves stage structure sulcus sympathetic nervous system sympathetic plexuses sympathetic system sympathetic trunks telencephalon thalami tion traced tract Transverse section vagi vertebrates visceral walls Wistar Institute
Popular passages
Page 138 - ... if the states of consciousness which a creature endeavours to maintain are the correlatives of injurious actions, and if the states of consciousness which it endeavours to expel are the correlatives of beneficial actions, it must quickly disappear through persistence in the injurious and avoidance of the beneficial.
Page 552 - However, the results of tests which entirely disprove this view of the phenomenon are given in the following table. The first column gives the number of the experiment, the second...
Page 193 - CR 1906 The development of the thyroid gland in Bdellostoma Stouti. Anat. Anz., Bd. 29. WHEELER 1899 The development of the urogenital organs of the lamprey. Zool. Jahrb., Bd. 13. WILLY, A. 1894 Amphioxus and the ancestry of the vertebrates. New York. PLATE 1 EXPLANATION OF FIGURES All figures were drawn with the aid of the camera lucida. Higgin's carmine and true blue inks were used to reproduce the colors of the stained sections represented in the colored plate. 1 Lymphoid accumulation in the lateral...
Page 142 - Or, on the other hand, we suppose the spontaneous movements to give pain, and assume that, with the pain, there will be a decrease of energy, extending to the movements that cause the evil, and thereby providing a remedy. A few repetitions of the fortuitous concurrence of pleasure and a certain movement, will lead to the forging of an acquired connection, under the law of retentiveness or contiguity, so that, at an after time, the pleasure or its idea shall evoke the proper movement at once.
Page 140 - If we substitute for the word Pleasure the equivalent phrase — a feeling which we seek to bring into consciousness and retain there...
Page 142 - That is to say, the lines of nervous communication through which the diffused discharge happened in this case to pass, have opened a new way to certain wide channels of escape; and, consequently, they have suddenly become lines through which a largo quantity of molecular motion is drawn, and lines which are so rendered more permeable than before.
Page 142 - Pleasure and pain can be agents of accommodation and development only if the one, pleasure, carry with it the phenomenon of "motor excess," and the other, pain, the reverse — probably some form of inhibition or of antagonistic contraction.
Page 539 - Subscriptions and all business correspondence should be addressed to THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY 36TH STREET AND WOODLAND AVENUE PHILADELPHIA, PA.
Page 138 - ... the average, agreeable or desired feelings went along with activities conducive to the maintenance of life, while disagreeable and habitually-avoided feelings went along with activities directly or indirectly destructive of life ; and there must ever have been, other things equal, the most numerous and long-continued survivals among races in which these adjustments of feelings to actions were the best, tending ever to bring about perfect adjustment.
Page 142 - ... quantity of molecular motion is drawn, and lines which are so rendered more permeable than before. On recurrence of the circumstances, these muscular movements that were followed by success are likely to be repeated : what was at first an accidental combination of motions will now be a combination having considerable probability.