Sometimes we feel so deeply that it causes physical discomfort, a visceral reaction that transports emotion to the body’s core. Immense joy takes the breath away; an awful sight induces nausea. An intense form of this relationship between mind and body is called “conversion disorder, ” in which stress or depression manifest as convulsing limbs, blindness, paralysis. The emotional condition converts into a physical one. Physicians used to call this strange psychologically driven illness “hysteria.” Stranger still is mass hysteria, This story is from Kinfolk Issue Thirty-Four Buy Now Related Stories Arts & Culture Issue 46 Samuel Ross Art, fashion, lifestyle: Samuel Ross has seen the future and it’s got his name all over it. Arts & Culture Food Issue 46 At Work With: Deb Perelman The little blog that could: An interview with Smitten Kitchen’s unflappable founder. Arts & Culture Issue 46 Word: Wintering When to withdraw from the world. Arts & Culture Issue 46 Brock Colyar An interview with a professional partygoer. Arts & Culture Issue 46 Studio Visit: Yoko Kubrick In the studio with a sculptor of monuments and mythologies. Arts & Culture Issue 46 Community Inc. Can a brand be friends with its fans?