There must be a mechanism whereby when we tighten our visual window, we somehow suppress the activity of these neurons in the parafacial nucleus that generate this physiological size. If there 's material that you really need to learn for sake of regurgitation later, or for something particularly important, try and read that from either a larger screen, or even better would be from printed materials or books. This is just simply how your brain circuits work. So broad in that visual window, print things out, look at a book. I didn't design the system, i always say, however, our visual system and respiratory system happened to evolve.

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