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Feudamonia t1_j8fqqti wrote

Reply to comment by runawaycluetrain in The brain can rapidly detect and process fearful faces that are otherwise invisible to the eye. There appears to be a neural pathway for detection of fear, which operates automatically, outside of conscious awareness. by Wagamaga

I agree that imperceptible would have been a better choice.

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bkydx t1_j8jlim6 wrote

Invisible is the correct term and just means "not perceptible by vision".

Your Amygdala is perceiving the "fear" and aware of the visual stimulus and receiving and relaying information even if your conscious is not aware and the image is not being processed by your visual cortex, so technically imperceptible would be incorrect unless you specify imperceptible by vision which is literally the scientific meaning of "Invisible"

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EllieBelly_24 t1_j8q4s4e wrote

But it is perceptable by vision, that's how your amygdala knows to be afraid of it. Maybe something else kicks in afterwards if it's around long enough, not sure, but you'd definitely "see" it, just not consciously

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