The amygdala is part of a group of neurons called subcortical nuclei located in the piriform lobe in the brain and in the front of the temporal lobe that has the same name because it resembles almonds. Emotional awareness and response And is the main component of the limbic system as well as the hippocampus
Amygdala consists of several subgroups of neurons, including the lateral, basal, and accessory basal nuclei. The receptor sensory input from the medial and central nuclei receptor cortex receives receptors from The first three nuclei And then passed out to the hypothalamus and the autonomic nerve center in the brainstem, including vagal nuclei and sympathetic neurons.
Amygdala is closely linked to the cerebral cortex, mediodorsal thalamus and medial striatum by sensory inputs (somatosensory, visual, auditory, gustatory, visceral, etc.) that are sent from secondary cortex. Which include the orbital cortex, prefrontal cortex, anterior temporal cortex, pontine taste areas, and rostral cingulate cortex, and more importantly, the olfactory input derived from the piriform cortex. , hypothalamus, septal nuclei, reticular formation of stem Look and from the hippocampus
From the hippo campus acting on deep-seated memories and amygdala acting emotionally The neural pathways associated with both of these parts are therefore involved in Acting behavior Severe emotions when some memories are stimulated There are two types of amygdala, which are sent directly from thalamus, which have a short distance. With data passed from thalamus to cortex and hippo campus first And then forward to the amygdala, which takes longer The information that comes directly from thalamus, the benefit of direct and indirect data transmission is that it will lead to preparation. Although it is unclear what the stimulus is The indirect part which arrives later Because it has already been scrutinized Will determine what the response behavior should be.
Amygdala sends the nerve to the septal nuclei, hypothalamus, cingulate gyrus, orbital cortex and hebenula. The primary function of amygdala, in addition to the smell Also plays an important role in determining behavior Especially in the presence of fear, aggression and fierceness amygdala is released and the animal will be tamed But the animals that are cut septal nuclei are fierce. In addition, another important function of amygdala is to reduce the severity of the emotional response to a minimum. After the brain has been repeatedly stimulated by the same stimulus many times, for example, the fear that occurred after receiving severe pain from being hit by wood in the past Which after that, just seeing the wood will cause fear even if not hit But if being hit frequently That fear will reduce violence.