Brain Pickings

An Eyeful of Sound: How Synesthesia Works

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The color of Friday, or what the absence on silence has to do with the presence of light.

We have a long-standing fascinating with synesthesia, the rare neurological condition that leads stimulation in one sensory pathway to trigger an experience in another — a neural short-circuiting that enables such strange phenomena as hearing colors, seeing sounds and tasting smells.

Earlier this year, we looked at some mesmerizing near-synesthetic ways of visualizing music in color and learned how synesthesia operates in the brain of an autistic savant. Today, we turn to An Eyeful of Sound– a fascinating animated documentary about audio-visual synesthesia, which attempts to add an intimate, visceral layer to our intellectual understanding of the peculiar condition.

All sounds have color. The alphabet has color. Days of the week have color. Each day has a color and a certain shape.”

What makes strange phenomena like synesthesia all the more fascinating is that they raise unsettling questions about some of the most fundamental givens of the “normal” brain: Does color even exist, or is it merely a product of our fancy? Do things have inherent, static smells, tastes, sounds and colors, or do we arbitrarily intuit those from our own minds to attribute to them? Are life’s sensory qualities static and permanent — is the sky always blue, lemons always sour — or are they fluid and dynamic attributes on a spectrum we just happen to experience arbitrary slices of?

HT @kirstinbutler

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