. Design for a brain. Brain -- Physiology; Central nervous system -- Mathematical models; Neurophysiology. ULTRASTABILITY IN THE LIVING ORGANISM 9/3 A more elaborate reaction by the homeostat is shown in Figure 9/3/1. 1 \r V. tt Time Figure 9/3/1 : Three units interacting. At R the effect of 2 on 3 was reversed in polarity. The machine was arranged so that its diagram of immediate effects was >3 The effect 3 —> 1 was set permanently so that a movement of 3 made 1 move in the opposite direction. The action 1 —> 2 was uniselector-controlled, and 2 —> 3 hand-controlled. When the traci
. Design for a brain. Brain -- Physiology; Central nervous system -- Mathematical models; Neurophysiology. ULTRASTABILITY IN THE LIVING ORGANISM 9/3 A more elaborate reaction by the homeostat is shown in Figure 9/3/1. 1 \r V. tt Time Figure 9/3/1 : Three units interacting. At R the effect of 2 on 3 was reversed in polarity. The machine was arranged so that its diagram of immediate effects was >3 The effect 3 —> 1 was set permanently so that a movement of 3 made 1 move in the opposite direction. The action 1 —> 2 was uniselector-controlled, and 2 —> 3 hand-controlled. When the tracing commenced, the actions 1 —> 2 and 2 —> 3 were demonstrated by the downward movement, forced by the operator, of 1 at St: 2 followed 1 downward (similar movement), and 3 followed 2 downward (similar movement). 3 then forced 1 up- ward, opposed the original movement, and produced stability. At R, the hand-control (2 —> 3) was reversed, so that 2 now forced 3 to move in the opposite direction to itself. This change set up a vicious circle and destroyed the stability ; but uniselector changes occurred until the stability was restored. A forced downward movement of 1, at S2, demonstrated the regained stability. 109. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ashby, William Ross. New York : Wiley
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