"Changes in brain functioning may diminish the integration and recall of memories of traumatic events for some children, at the same time increasing intrusive thoughts about them.
Intrusive thoughts, in turn, have been associated with distress.
For this reason, cognitive theories of trauma focus on the need to integrate frightening or confusing aspects of a traumatic event into existing cognitive models.
Talking about the (traumatic) event is hypothesized to facilitate cognitive processing or integration leading to the possibility that families may play a role in this process."
Proctor, L.J. (2006). Children growing up in a violent community: The role of the family, Aggression and Violent Behavior, 11, 558–576