Yes. EMDR saved my life. I'd had past traumas that I didn't deal with which came flooding back after dday and compounded everything.
Some information from a therapist's website that may help anyone, especially newbies, wondering what the hell is going on with them and why:
BRAIN STRUCTURES AND PHYSIOLOGICAL RESPONSES TO TRAUMA
PTSD reactions are physiologically as well as psychologically based. During a traumatic event, a person's brain and physiology are profoundly affected. Lower brain centres responsible for the emergency strategies of fight/flight and freeze are immediately called into play, resulting in a dramatic biochemical cascade which readies the body for survival.
The amygdala - our early warning system
At the heart of our survival responses is a midbrain structure called the amygdala, considered to be part of the brain's emotional processing system (the limbic system). It is like an early warning system – a "smoke detector" in our brains. It can appraise sensory input within a fraction of a second and is responsible for alerting us to possible danger, assigning an event its emotional valence (good/bad, safe/dangerous).
The amygdala is an organ of memory as well as appraisal, registering experience in the form of presymbolic (nonverbal) emotional memories which are not conscious. Thus, our appraisals of the present may be affected by traces of the past that lie outside of our awareness.
What does the amygdala do?
When activated, the amygdala triggers an immediate, body-wide response to threat by signaling the brainstem to activate the sympathetic branch of the autonomic nervous system. The result is a release of potent neurochemicals, including epinephrine (adrenaline), norepinephrine and cortisol. There is an instant alertness and blood is shunted to where it is needed most to carry out the neuromuscular activity of fight / flight.
However, the body does not move into a full-blown fight or flight response unless the meaning assigned by yet another limbic structure – the hippocampus - is that the situation is indeed dangerous. This structure modulates the amygdala's bias toward hair-trigger reactions.
How the hippocampus modulates the amygdala's reaction
The hippocampus organizes information according to sequence and context. It places an event in time and essentially is the brake that engages the parasympathetic branch of the autonomic nervous system to deactivate the state of arousal that was initiated by the amygdala.
The body returns to a state of relaxation once the emergency is over and either fight or flight was successful or the event was evaluated to be a false alarm.
How Trauma can "short-circuit" the return to relaxation
However, in cases of overwhelming trauma, the extreme cascade of neurochemicals is thought to bypass the engagement of the hippocampus as well as the language centres of the brain (hence, the experience of "speechless terror"). In this case, the amygdala remains in a reactive state, priming the body for fight or flight. This may be experienced subjectively as emotional reactivity, with periods of either unremitting anxiety or a propensity towards aggression and rage. It also explains the symptoms of intrusion that exist in PTSD.
In childhood, secure relationships have the effect of allowing the child's developing hippocampus to balance the reactivity of the amygdala. However, experiences of abuse, neglect and acute trauma can temporarily shut down the hippocampus or inhibit its development, leaving the reactive amygdala unmodulated. This has widespread implications for the child's development.
Dissociation and the freeze response to danger
The third biologically driven response to danger is the freeze or immobility response. The freeze state is activated when fight or flight are pointless. While in this state, the body releases additional doses of pain-killing endorphins. It is here that we must turn our attention to dissociation. Dissociation is thought to be the human correlate of the immobility response in animals.
While in a freeze state, people dissociate – that is, they become detached and disconnected from the event. The alert mind becomes numb, perhaps owing to effect of increased circulating opioids, and memory access and storage are impaired, resulting in some amnesia for the events that occur while in this state.
Bear in mind that success in biological terms is based on survival – that is, what matters is whether we survived, not how we survived. This is important to note in countering the self-recrimination of someone who blames themselves for not running or fighting back when actually their autonomic nervous system made that decision for them by moving into a freeze response.
There is a paradoxical quality to the immobility response. Recall that huge amounts of energy have been mobilized for the fight/flight responses - this undischarged energy then remains a part of the automatic vegetative or freeze state.