As I’ve discussed before in this blog, memories, particularly traumatic memories can be very inaccurate recordings of events. I think I’ve come across a good explanation for why that is so – and what can be done about it.
Neuroscientists at The University of Queensland explain how emotional events can sometimes lead to disturbing long term memories. During studies of the almond-shaped part of the brain called the amygdala – a region associated with processing emotions – Queensland Brain Institute (QBI) scientists uncovered a cellular mechanism underlying the formation of emotional memories – and it involves a well known stress hormone – noradrenaline, the brain’s version of adrenaline. Noradrenaline affects the amygdala by controlling chemical and electrical pathways in the brain responsible for memory formation.
Think of this interaction between chemical and brain structure like a file cabinet.
When an emotional event occurs noradrenaline is released in the brain – the more emotionally traumatic the event, the more adrenaline gets turned on in the body and more noradrenaline released in the brain. This chemical is like the key to the file cabinet. Once open, the drawer assigned to that particular kind of event reveals many folders full of data – images, sensations, sounds and more that are similar in nature to the current event being experienced.
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