ANXIETY DISORDERS
Anxiety: An Overview
Anxiety is a universal human experience characterized by feelings of tension, worry, and anticipation of a negative future event. While mild to moderate anxiety enhances focus and performance, chronic and severe anxiety can impair daily functioning.
- Definition: Anxiety is a future-oriented emotion involving physical tension and apprehension about potential threats.
- Difference Between Anxiety, Fear, and Worry:
- Fear: Immediate emotional response to an actual, identifiable threat, triggering a fight-or-flight response.
- Anxiety: Diffuse, long-lasting worry about possible future threats.
- Worry: Repetitive, uncontrollable thoughts about potential negative outcomes.
Components of Anxiety and Fear
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Cognitive/Subjective:
- Persistent concern about future dangers or threats.
- Feeling of helplessness in managing or predicting these threats.
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Physiological:
- Physical symptoms include increased heart rate, muscle tension, and rapid breathing.
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Behavioral:
- Strong urge to avoid situations perceived as threatening.
Types of Anxiety Disorders (DSM-5)
The DSM-5 classifies anxiety disorders into five primary categories:
- Specific Phobia
- Social Anxiety Disorder (Social Phobia)
- Panic Disorder
- Agoraphobia
- Generalized Anxiety Disorder (GAD)
Anxiety disorders are marked by irrational fears, severe distress, and functional impairments.
Specific Phobia
Definition
Specific phobia is an intense, irrational fear of a particular object or situation that causes significant distress or impairment.
Types of Specific Phobia
According to DSM-5, the main subtypes include:
- Animal Phobia: Fear of animals (e.g., spiders, snakes).
- Natural Environment: Fear of storms, water, or heights.
- Blood-Injection-Injury: Fear of blood, needles, or medical procedures.
- Situational: Fear of enclosed spaces, flying, or driving.
- Other: Fear of choking, vomiting, or specific situations.
Case Study
Ram, a 15-year-old boy, exhibits intense fear of spiders. He avoids places where spiders may exist, checks his sheets obsessively, and suffers from trembling and nausea when encountering a spider.
DSM-5 Criteria for Specific Phobia
- Marked fear or anxiety about a specific object or situation.
- Immediate fear response provoked by the phobic object or situation.
- The fear is disproportionate to the actual danger.
- Persistent avoidance lasting 6 months or more.
- Clinically significant distress or impairment.
Social Anxiety Disorder (Social Phobia)
Definition
Social Anxiety Disorder is characterized by an intense fear of being scrutinized, embarrassed, or humiliated in social situations.
Case Study
Rohit, a reserved teenager, avoids social events, struggles to speak in class, and hides in restrooms during lunch to avoid scrutiny.
DSM-5 Criteria for Social Anxiety Disorder
- Marked fear of social situations involving possible scrutiny.
- Fear of showing anxiety symptoms that may be humiliating.
- Persistent avoidance or distress in social situations for 6 months or more.
- Clinically significant distress or impairment in functioning.
Prevalence and Risk Factors
- Lifetime prevalence: 12% globally, 2.57% in India.
- More common in women than men (60%).
- Onset typically occurs in adolescence.
- Co-morbid conditions: Depression, anxiety disorders, and substance abuse.
Panic Disorder and Agoraphobia
Panic Disorder
- Characterized by recurrent, unexpected panic attacks.
- Panic attacks involve sudden terror, heart palpitations, dizziness, and shortness of breath.
Agoraphobia
Agoraphobia involves intense fear of situations where escape may be difficult or help unavailable during a panic attack. Commonly avoided places include:
- Crowded areas (e.g., markets, theaters).
- Public transportation.
- Open spaces or enclosed areas.
Case Study
Rahul, a 41-year-old man, avoids leaving his house after repeated panic attacks in public places. His fear of being unable to escape prevents him from participating in daily activities.
DSM-5 Criteria for Agoraphobia
- Marked fear of two or more situations, such as public transport, open spaces, or enclosed places.
- Avoidance of these situations due to fear of panic attacks or embarrassment.
- Persistent for 6 months or more, causing distress or impairment.
Prevalence and Gender Differences
- Women are more likely to experience agoraphobia than men (80–90%).
- Onset typically occurs in early adulthood.
Generalized Anxiety Disorder (GAD)
Definition
GAD is characterized by excessive, uncontrollable worry about various life events or activities for at least 6 months.
Symptoms
- Persistent worry and tension.
- Hypervigilance for potential threats.
- Physical symptoms like muscle tension, insomnia, and fatigue.
- Difficulty making decisions and managing uncertainties.
Case Study
Simran, a 12-year-old girl, constantly worries about her mother’s health, failing exams, and other daily events. She experiences fatigue and difficulty concentrating.
DSM-5 Criteria for GAD
- Excessive worry occurring more days than not for at least 6 months.
- Difficulty controlling the worry.
- Associated symptoms: restlessness, fatigue, difficulty concentrating, irritability, muscle tension, and sleep disturbances.
Prevalence and Risk Factors
- Lifetime prevalence: 5.7% globally, 5.8% in India.
- Twice as common in women as in men.
- Frequently co-occurs with depression, panic disorder, and social phobia.
Causal Factors of Anxiety Disorders
Biological Factors
- Genetics: Anxiety disorders show moderate heritability.
- Neurotransmitters: Imbalances in GABA, serotonin, and norepinephrine are linked to anxiety.
- HPA Axis: Overactivation of the stress-response system increases anxiety levels.
- Fear Circuitry: The amygdala plays a central role in fear processing and anxiety responses.
Psychological Factors
- Classical Conditioning: Learned fear responses through direct or vicarious conditioning.
- Cognitive Biases: Overestimating threats and interpreting ambiguous situations as dangerous.
- Negative Appraisal: Tendency to view situations in a negative, threatening way.
Social and Sociocultural Factors
- Parental overprotection and lack of independence.
- Gender differences: Higher prevalence in women due to societal stressors.
- Cultural influences: Collectivist cultures show higher levels of social anxiety.
Summary
Anxiety disorders, including specific phobia, social anxiety disorder, panic disorder, agoraphobia, and GAD, involve persistent fear and anxiety that impair daily functioning. Their development results from a combination of biological, psychological, and sociocultural factors. Early diagnosis and targeted interventions are critical to improving outcomes for individuals with anxiety disorders.