SYNESTHESIA

In this volume in the MIT Press Essential Knowledge series, Richard Cytowic offers a concise, accessible primer on this fascinating human experience.Cytowic explains that synesthesia's most frequent manifestation is seeing days of the week as colored, followed by sensing letters, numerals, and punctuation marks in different hues even when printed in black. Other manifestations include tasting food in shapes, seeing music in moving colors, and mapping numbers and other sequences spatially.