9 Matching Annotations
  1. Sep 2021
    1. there's a fact of the matter right this minute about whether your high school 00:22:51 sweetheart is thinking about you you just can't tell but the universe knows that fact is there

      This is the existential reality of humans, that we only know that which is in our own limited sensory bubble. We have zero access to that which lay beyond. Only a fool would argue there is nothing happening out there if we don’t sense it, and yet we have no way to prove it. This is an intrinsic epistemological disconnect with reality that makes each of us feel an intrinsic sense of alienation. Why is our consciousness constrained in this profound way?

    1. For psychological purposes there are two major changes in recent ideas of nervous function. One concerns the single cell, the other an "arousal" system in the brain stem. The first I shall pass over briefly; it is very significant, but does not bear quite as directly upon our present problem. Its essence is that there are two kinds of activity in the nerve cell: the spike potential, or actual firing, and the dendritic potential, which has very different properties. There is now clear evidence (12) that the dendrite has a "slow-burning" activity which is not all-or-none, tends not to be transmitted, and lasts 15 to 30 milliseconds instead of the spike's one millisecond. It facilitates spike activity (23), but often occurs independently and may make up the greater part of the EEG record. It is still true that the brain is always active, but the activity is not always the transmitted kind that conduces to behavior. Finally, there is decisive evidence of primary inhibition in nerve function (25, 14) and of a true fatigue that may last for a matter of minutes instead of milliseconds (6, 9). These facts will have a great effect on the hypotheses of physiological psychology, and sooner or later on psychology in general. Our more direct concern is with a development to which attention has already been drawn by Lindsley (24): the nonspecific or diffuse projection system of the brain stem, which was shown by Moruzzi and Magoun (34) to be an arousal system whose activity in effect makes organized cortical activity possible. Lindsley showed the relevance to the problem of emotion and motivation; what I shall attempt is to extend his treatment, giving more weight to cortical components in arousal. The point of view has also an evident relationship to Duffy's (13). The arousal system can be thought of as representing a second major pathway by which all sensory excitations reach the cortex, as shown in the upper part of Fig. 1; but there is also feedback from the cortex and I shall urge that the psychological evidence further emphasizes the importance of this "downstream" effect. In the classical conception of sensory function, input to the cortex was via [p. 249] the great projection systems only: from sensory nerve to sensory tract, thence to the corresponding sensory nucleus of the thalamus, and thence directly to one of the sensory projection areas of the cortex. These are still the direct sensory routes, the quick efficient transmitters of information. The second pathway is slow and inefficient; the excitation, as it were, trickles through a tangled thicket of fibers and synapses, there is a mixing up of messages, and the scrambled messages are delivered indiscriminately to wide cortical areas. In short, they are messages no longer. They serve, instead, to tone up the cortex, with a background supporting action that is completely necessary if the messages proper are to have their effect. Without the arousal system, the sensory impulses by the direct route reach the sensory cortex, but go no farther; the rest of the cortex is unaffected, and thus learned stimulus-response relations are lost. The waking center, which has long been known, is one part of this larger system; any extensive damage to it leaves a permanently inert, comatose animal.

      After 1954 researchers seemed to start looking at actual brain activity and noted that while it was always active, it didn't always transmit this activity. (who knew!). a second major pathway where sensory excitations can reach the cortex is the arousal system, it shows that a downstream effect is important! So we have the classical conception of sensory function which was from the corresponding sensory nucleus of the thalamus directly to a sensory projection area of the cortex. Which is the quick way to transmit information (or the direct route). There is a second way, but it is slow. Its referred to as the excitation, which slowly makes its way through fibers and synapses. The message can get mixed up or scrambled and then delivered to cortical areas. Which really makes them not messages, but act more as a background support system. Without this background action (or arousal system) your sensory impulses would get to their destination quickly, but they would not go anywhere else. Then we wouldn't have any learned stimulus-response, and that would be bad!

  2. Apr 2021
  3. Feb 2021
  4. Nov 2020
    1. creating sensory rich memories

      I like this phrase and I want to implement it into my thinking. This is one of the greatest gifts that we can give ourselves or the greatest way that we can hamper ourselves: within the sensory rich memories that we create. Isaiah 26:3

  5. Mar 2017
    1. Locke’s logicalprocess of knowledge discernmen

      World → sensory perception → idea → word.

    2. sensations

      In addition to the quotes from Hume in the MicroResponse, this might be helpful:

      "It appears then, that, amidst all the variety and caprice of taste, there are certain general principles of approbation or blame, whose influence a careful eye may trace in all operations of the mind. Some particular forms or qualities, from the original structure of the internal fabric, are calculated to please, and others to displease; and if they fail of their effect in any particular instance, it is from some apparent defect or imperfection in the organ...Many and frequent are the defects in the internal organs, which prevent or weaken the influence of those general principles, on which depends our sentiment of beauty or deformity" (833).

  6. Nov 2013
    1. For between two absolutely different spheres, as between subject and object, there is no causality, no correctness, and no expression; there is, at most, an aesthetic relation:

      Hm. Well, that's something, at least. Can we feel or sense or experience things beyond description with our sensory perception?