|MadSci Network: Neuroscience|
Hello, For almost a century, psychological studies have shown that color could trigger arousal and / or emotion. The question is : how can it be ? Explanations for activation exist. But what about emotion ? In the retina, successive specialized cells process wavelength-related information to ganglion cells that project via optic tract to LGN (and up to striate - blobs in V1 - and extrastriate areas, of which V4 or V8, according to Zeki or Hadjikhani) and to the pulvinar / SC, then to central nucleus of amygdala. OK : we got emotional valence through the amygdala nuclei... But, apparently, only magnocellular and possibly koniocellular pathways (and they do not code for "color", parvocellular pathway does)reach superior colliculus and then amygdala nuclei. How, then, could amygdala receive wavelength-related information and how could color "trigger" emotional states ? Could there be a feedback pathway, from V4 / V8 (or even further from the ventral route areas) to amygdala ? Wouldn't it be too slow a pathway ? (data is processed much faster by retino-tectal route than retino-geniculo-cortical route). Could someone enlight me here ? Best regards, Bernard Roullet Rennes - France
Re: How can color trigger emotional states ?
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