This explains how emotion and cognition interact with each other. Tunnel memory is an interesting notion. In general, all perceptions are distorted somewhat.
So-called flashbulb memories actually fade considerably even though, paradoxically, they seem so vivid that we hold a misguided confidence in their fidelity.
Emotion produces a kind of tunnel memory, boosting recall of central objects but allowing people to forget surrounding details.
Putting a positive spin on a bad situation—a technique called cognitive reappraisal—can both enhance accuracy in emotional memories and diminish their negative overtones.