There are more than a few testimonials online from daughters who, after seeing the film, called their mothers to apologize for their nightmarish teenage behavior.
It's unclear how psychological trauma causes retrograde amnesia, but it's thought that perhaps forgetting traumatic events is a psychological defense against the distress they can cause.
They said the decision to refuse to screen Upstream is rooted in their respect for industry regulations, and they are not calling for support for this decision.
The DSM-V further states that the amnesia can't be " due to any physiologic effects" of a drug, or be better explained by any other medical condition associated with retrograde amnesia.