To speak more truly the olfactory "nerve" is not a nerve at all, he says, but a part of the brain, in intimate connection with its anterior lobes.
I), and, as Marshall has found in Aves and Elasmobranchii, it arises at a stage prior to the first differentiation of an olfactory bulb as a special lobe of the brain.
From each of them there springs a long olfactory nerve, extending for the whole length of the rostrum to the olfactory sack.
Section through the olfactory involution and part of fore-brain of a larva on the ninth day after impregnation, shewing olfactory nerve.
Even in the oldest of the two brains the olfactorylobes are very slightly developed, constituting, however, small lateral and ventral prominences of the front end of the hemispheres.
Footnote 509: The homologies of the olfactory lobes throughout the group of Fishes require further investigation.
On the right side is seen the olfactory nerve coming off from the olfactory lobe.
Section through the unpaired cerebral rudiment during stage O, to shew the origin of the olfactory lobe and the olfactory nerve.
We might next inquire, if the odours we perceive are as strongly impressed on the olfactory organ, as the subjects of visual perception on the eye?
Thus a person labouring under a catarrh, will be unable to detect the odours which certain substances communicate in a healthy condition of his olfactory organ.
We have a number of striking cases of very acute olfactory power.
There may be olfactory emanations distinguished by some as odors and by others felt, not as odors, but only in their influential results on nervous systems unusually and abnormally susceptible.
It is common to read of the acute olfactory powers of the turkey; that he scents the hunter at one hundred to three hundred yards; the truth is it must be a pungent odor to have a turkey detect it at ten paces.
There was no corn to tickle their olfactory organs from afar, no traffic to appeal to their sense of hearing.
For instance, a dog has always been accustomed to eat a piece of meat when his organism requires nourishment, and when his olfactory nerves respond to the particular stimulus occasioned by the proximity of the food.
The organ of smell, absent only in certain whales, consists of a ramification of the olfactory nerves over a moist mucous membrane in the nose.
In front of the true brain are the olfactory lobes, the nervous centre for the sense of smell.
Taste seems to be little developed, but olfactory organs of considerable complexity are present in most forms, and consist of a pair of nostrils with olfactory papillae on their inner surfaces.
The olfactory organs, one on each side of the head, are hollow sac-like depressions, closed at the rear.
In front of these are the small olfactorylobes which send nerves to the nostrils.
Most anteriorly make out, as in the toad, the paired olfactory lobes.
Smell was, in his view, an adjunct of the respiratory process: persons of acute smell were those who had the strongest breathing: olfactory effluvia came from many bodies, and especially from such as were light and thin.
I may remark, however, that Theophrastus, disputing the doctrine of sensory effluvia generally, disputes the existence of the olfactory effluvia not less than the rest (s.
He pointed out that there was a relationship between the abdominal viscera and the olfactory mucous membrane of the nose.
The membrane of the nose concerned in smell is supplied by the first pair of cranial nerves, the so-called olfactory nerves.
The balmy air, laden with the perfume of grasses and the smell of seaweed, soothes the olfactory sense with its wild fragrance, soothes the palate with its sea savor, soothes the mind with its pervading sweetness.
An ideal canine for an archer would be one having the olfactory organs of a hound and the reasoning capacity of a college professor.
What he got in his olfactory investigation must have been confusing.
A man whose olfactory nerves are so badly organized as to dislike Cavendish is too great a muff to be considered.
And the cerebral masses begin to be wider and higher than the other parts of the brain, though they do not extend forward above the olfactory lobes, as is often seen in Mammals.
But in a man's head you would find a very large and fine optic centre, and only a mere shrivelled relic to represent the olfactory lobes.
The big olfactory lobes are in direct communication with a thousand other nerves; odours rouse trains of thought or powerful emotions in their minds just as visible objects do in our own.
Their olfactory nerves give them nearly all the information they can gain about the external world, and their brains take in this information and work out the proper movements which it indicates.
The interior of the nose is lined by a fine moist membrane, on which the olfactory nerve is distributed.
The cause of odour is quite unknown; though, as most volatile substances are odorous, it is supposed to be some volatile matter which comes in contact with the olfactory nerve, or nerve of smelling.
Hence their olfactory powers probably constitute a closer psychological approximation to those of mammals than to the topochemical odor-sense of ants, for they can hardly furnish any constant and definite space-relations.
Tactile hairs are found on the antennæ together with the olfactory papillæ.
Her poor olfactory sense, which is useful only at very close range.
Nor could it be brought about by an olfactory sense which furnished no spatial associations.
In combination with the powerful development of the cerebrum (corpora pedunculata) the topochemical olfactory sense of the antennæ constitutes the key to ant psychology.
Ants and Some Other Insects An Inquiry into The Psychic Powers of these Animals With an Appendix on The Peculiarities of Their Olfactory Sense By Dr.
Nevertheless it is probable that dogs, hedge-hogs, and similar animals acquire a certainolfactory image by means of sniffing.
This is very large in the worker, much smaller in the female, and almost vestigial in the male, whereas the optic and olfactory lobes are very large in the latter.
They are wafted towards us as wild mixtures in an airy maelstrom, which brings them to the olfactory terminations without order in the inhaled air or in the mucous of the palate.
It is certain that in some aerial insects the olfactorysense has dwindled to a minimum, e.
This, however, would be inconceivable on the theory of a physical wave-sense, while it agrees very well with that of an extremely delicate, chemical olfactory sense.
The camel in the desert is often saved from death by the keenness and accuracy of his olfactory organs, which tell him the direction he must take to fill his depleted reservoir with water.
The olfactory cells are not as easily examined and traced in their connections as are the end organs of the sense of taste.
We are unable to say just what the nature of a smelling substance is which makes it so perceptible to our olfactory organs.
The divisions of the olfactory nerve pass through many small openings in the ethmoid bone to connect with the olfactory bulbs, which in turn connect with the cerebrum (A, Fig.
In fact, the olfactory cells resemble closely the cell-bodies of neurons, and are thought to be such.
The substance which is smelled must be kept moving through the nostrils and made to come in direct contact with the olfactory cells.
Not only do the cerebral hemispheres overlap the olfactory lobes and cerebellum, but they extend in advance of the one and farther back than the other.
Brown, and all other immaterialists, universally believe that the sensation of smell is produced by small material particles, acting upon our olfactory nerves.
A piece of iron is affected in a certain manner by introducing into its presence a loadstone, so the mind is affected in a certain manner by the presence of light upon the retina, or by the presence or odour upon the olfactory nerve.
Fortunately the wind is blowing away from us or we would have olfactory evidence that what is not found is far worse than what has been exposed.
It would not be strange if the carcasses of domestic animals, which must be hidden in the enormous mass, were finally to be realized by the olfactory organs of the bystanders.
There was a faint odor of decomposition and another day will cause the vicinity of the viaduct to suggest a charnel house to the olfactory senses.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "olfactory" in a variety of sentences. We hope that you will now be able to make sentences using this word.
