An analysis of the biological basis of fear

physiology of fear

In the search of mechanisms at the basis of fear conditioning, it is therefore possible to place a stimulation electrode in the auditory thalamus or in the bundle of fibers connecting the auditory thalamus to the amygdala and a recording electrode in the basolateral complex of the amygdala, and more specifically in the lateral nucleus.

Particularly, compared with healthy controls, patients with flying phobia rated conditioned stimuli more frightening. Anxiety is manifested in three ways: in a person's thoughts cognitivelyin a person's actions behaviorallyand in physiological reactions.

Fear psychology

Ethologists have also made the important observation that fear is often mixed up with other aspects of motivation. The LC is in turn innervated by areas such as the amygdala which processes fear-related stimuli and other areas receiving visceral stimuli relayed by the NTS. The LC is therefore in a key position to integrate both external sensory and internal visceral stimuli and influence stress- and fear-related neuroanatomical structures, including cortical areas. It also triggers release of stress hormones and sympathetic nervous system. Individual differences in coping styles do exist and may also influence this choice. The hippocampus and prefrontal cortex help the brain interpret the perceived threat. However, children with poor habituation are at high risk of developing nonexperiential-specific phobias. Synaptic plasticity, such as long-term potentiation LTP , which is an increase in synaptic efficacy, at appropriate synapses during memory formation is believed to be both necessary and sufficient for storage of information Garcia ; Lynch , including fear conditioning LeDoux ; Maren Years ago, barbiturates, another class of drugs were used to control anxiety. Also, it is reasonable to conclude that anxiety can be distinguished from fear in that the object of fear is 'real' or 'external' or 'known' or 'objective.

There are several different perspectives on the motivations of fear and anxiety: cognitive, learned and physiological. This raises yet another question: While many can enjoy a good fright, why might others downright hate it?

The function of these changes is to facilitate coping with an adverse or unexpected situation. It's an automatic response that is crucial to our survival.

An analysis of the biological basis of fear

This example of classical fear conditioning corresponds to auditory fear conditioning. Animal models Some of the neurobiological mechanisms underlying anxiety may already be present in very simple organisms, such as the snail Aplysia, which can show forms of learning akin to anticipatory and chronic anxiety.

Thus, a sudden noise or loss of physical support can induce an innate fear reaction, and restraint of bodily movements triggers rage. This is usually accompanied by learning and applying new coping techniques to manage the fear response.

what causes fear in the brain
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Fear and Anxiety