Stimuli have three intensity levels that affect same brain regions differently.
objective threshold
Intensity below threshold level {objective threshold, experience} is too low for perception.
perception
Intensity above objective threshold causes non-conscious perception. If stimulus intensity level is above objective threshold but below subjective threshold, stimulus does not become conscious but can influence preferences for same or associated stimuli [Kunst-Wilson and Zajonc, 1980] [Murphy and Zajonc, 1993].
subjective threshold
At higher intensity level {subjective threshold, experience}, people begin to detect sensations. For all senses, consciousness requires intensity level higher than intensity level needed for brain to detect and use stimuli [Dehaene et al., 1998] [Morris et al., 1998] [Morris et al., 1999] [Whalen et al., 1998].
accumulation
Perhaps, activation must build to pass subjective threshold. Building counters dissipative and inhibitory processes and has positive feedback and signal recursion.
feedback
Perhaps, positive feedback must cause response spiking to pass subjective threshold. After spiking, activity falls, but sensations can linger [Cheesman and Merikle, 1984] [Kihlstrom, 1996].
Consciousness>Consciousness>Sense>Experience>Processing
1-Consciousness-Sense-Experience-Processing
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Date Modified: 2022.0224