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Pathways from central nucleus of the amygdala to downstream areas then control defensive behavior (freezing) and autonomic and endocrine responses. Recent studies implicate the prelimbic cortex in fear expression as well, possibly by way of its connections to the basal and then to the central nucleus of the amygdala. [1]
Anxiety disorders affect nearly 30% of adults at some point in their lives, with an estimated 4% of the global population currently experiencing an anxiety disorder. However, anxiety disorders are treatable, and a number of effective treatments are available. [11] Most people are able to lead normal, productive lives with some form of treatment ...
Anxiety is an emotion characterised by an unpleasant state of inner turmoil and includes feelings of dread over anticipated events. [1] [2] [3] Anxiety is different from fear in that fear is defined as the emotional response to a present threat, whereas anxiety is the anticipation of a future one. [4]
They do produce central nervous system depression, but they also excite certain areas of the central nervous system. To remain true to the term "depressant", opioids cannot be classified as such. For opioid agonists and opium derivatives, these are classified differently.
The limbic system, also known as the paleomammalian cortex, is a set of brain structures located on both sides of the thalamus, immediately beneath the medial temporal lobe of the cerebrum primarily in the forebrain. [1] Its various components support a variety of functions including emotion, behavior, long-term memory, and olfaction. [2]
[1] [2] The enteric nervous system is sometimes considered part of the autonomic nervous system, and sometimes considered an independent system. [3] The autonomic nervous system functions to regulate the body's unconscious actions. The sympathetic nervous system's primary process is to stimulate the body's fight or flight response.
Generalized anxiety disorder (GAD), also known informally as anxiety, is an anxiety disorder characterized by excessive, uncontrollable and often irrational worry about events or activities. [5] Worry often interferes with daily functioning, and individuals with GAD are often overly concerned about everyday matters such as health, finances ...
Substance avoidance can be important in reducing anxiety and panic symptoms, as many substances can cause, exacerbate, or mimic symptoms of panic disorder. For example, caffeine has been known to have anxiety and panic-inducing properties that can especially present in those who are more susceptible to panic attacks. [60]