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At first fermentation indigestion shows occasionally; the intervals between these attacks of acid stomach, or fermentation, grow shorter and shorter until they are of daily occurrence; accompanying this fermentation there is gas distention of the bowels, and this inflation in time interferes with their motility and weakens them so that sluggishness is succeeded by obstinate constipation.
We described the relations of the two systems to each other and to consciousness by saying that the system Forec. is like a screen between the system Unc. and consciousness. The system Forec. not only bars access to consciousness, but also controls the entrance to voluntary motility and is capable of sending out a sum of mobile energy, a portion of which is familiar to us as attention.
Thus there was required a second activity in our terminology the activity of a second system which should not permit the memory occupation to advance to perception and therefrom to restrict the psychic forces, but should lead the excitement emanating from the craving stimulus by a devious path over the spontaneous motility which ultimately should so change the outer world as to allow the real perception of the object of gratification to take place.
It is the prostatic fluid, according to Fürbringer, which imparts its characteristic odor to semen. It appears, however, to be the main function of the prostatic fluid to arouse and maintain the motility of the spermatozoa; before meeting the prostatic fluid the spermatozoa are motionless; that fluid seems to furnish a thinner medium in which they for the first time gain their full vitality.
T. W. Engelmann proposes, in the Botanische Zeitung, a new test, of an extremely delicate nature, for determining the presence of very minute quantities of oxygen, namely: its power of exciting the motility of bacteria.
The vigorous motility of the tadpole-like organisms is obvious to anyone who has ever seen fresh semen under the microscope; and if it is correct, as Clifton Edgar states, that the spermatozoa may retain their full activity in the female organs for at least seventeen days, they have ample time to exert their energies.
Conditions are less harmless when a displacement of forces is produced, not through a nocturnal diminution in the operation of the critical censor, but through pathological enfeeblement of the latter or through pathological reinforcement of the unconscious excitations, and this while the foreconscious is charged with energy and the avenues to motility are open.
For this reason it was constructed after the plan of a reflex apparatus; the motility, originally the path for the inner bodily change, formed a discharging path standing at its disposal.
This is to say, that the permanent inhibition of a movement at this period is best secured by establishing some different movement. The further consideration of the cases of great motility would lead to the examination of the kinds of memory and imagination and their treatment; to that we return below. We may now take up the instances of the sensory type considered with equal generality.
I therefore assume that under the control of the second system as compared with the first, the course of the excitement is bound to entirely different mechanical conditions. After the second system has finished its tentative mental work, it removes the inhibition and congestion of the excitements and allows these excitements to flow off to the motility.
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