First direct evidence for ultra-fast responses in human amygdala to fear
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Christian
Updated: 06-16-2016 04:23 am
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"The amygdala has a privileged spot in the brain, being one of the best connected structures. It sends and receives projections from brain areas at different levels and at the same time is capable of indirectly unleashing physiological changes and autonomic nervous system responses.", explains Constantino Méndez-Bértolo, researcher from the Campus de Excelencia Internacional Moncloa of the Universidad Complutense and the Universidad Politécnica de Madrid. However, its location deep inside the brain makes it a difficult structure to study with common neuroimaging techniques."The amygdala has a privileged spot in the brain, being one of the best connected structures. It sends and receives projections from brain areas at different levels and at the same time is capable of indirectly unleashing physiological changes and autonomic nervous system responses.", explains Constantino Méndez-Bértolo, researcher from the Campus de Excelencia Internacional Moncloa of the Universidad Complutense and the Universidad Politécnica de Madrid. However, its location deep inside the brain makes it a difficult structure to study with common neuroimaging techniques."
"The analysis of amygdala activity from these patients allowed the researchers to gather the first direct evidence in humans that this area by itself is able to extract information about biologically relevant stimuli in the visual scene very rapidly, before receiving more precise visual input from the neocortex. he analysis of amygdala activity from these patients allowed the researchers to gather the first direct evidence in humans that this area by itself is able to extract information about biologically relevant stimuli in the visual scene very rapidly, before receiving more precise visual input from the neocortex. "
http://www.eurekalert.org/pub_releases/2016-06/ucdm-fde061516.php
The amygdala sends signals to the prefrontal cortex (PFC) which can manage go/no-go signals from striatum which corresponds to approach and avoid behavior and the classical fight or flight, or fight, flight or freeze
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