Stanford University researchers have suggested that a lack of response to emotionally meaningful information in the insula, a brain region at the hub of the salience network, can lead to a cascade of effects that result in inappropriate emotional displays.

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Studies like this one conducted in Tokyo suggest that prolonged gum chewing activates part of the brain (the ventral part of the prefrontal cortex) that in turns sets off a cascade of effects resulting in fewer feelings of depression.

FORBES: Chew Yourself a Better Brain

"We will see these effects cascade over the next week, " she said.

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The National Capital Commission's (NCC) Guy Laflamme, one of the festival's organizers, said the opening will be "bigger than ever" featuring "a huge cascade of pyrotechnical effects" pouring from the Alexandra Bridge into the icy river.

BBC: Embracing winter in Ottawa