Take as example the story of a military veteran suffering from severe PTSD, taking minutes to recover from hearing the sound of a louder motorcycle that his brain associated with gunshot sounds.
Dr. Perry explains that the reason behind this behavior is the sequential processing of the brain: the sound of the motorcycle is first processed by the brainstem, which developed to associate these kind of events with something potentially deadly. This causes the other parts of the brain to temporarily “shut down”, and only reactivating the cortex after a few minutes, when he recovers.
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This is the first book that I’ve read on trauma. I found it pretty good.
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