Understanding Anxiety Disorders
What is Anxiety?
Normal Anxiety vs. Anxiety Disorder:
Normal Anxiety:
- Natural response to stress or perceived threat
- Adaptive and protective (prepares us for danger)
- Proportionate to situation
- Temporary and subsides when threat passes
- Does not significantly interfere with daily functioning
- Examples: Nervousness before exam, interview, important event
Pathological Anxiety (Anxiety Disorder):
- Excessive, intense, and persistent
- Out of proportion to actual threat or danger
- Occurs in absence of real danger
- Persists even after threat is gone (or when no threat exists)
- Significantly impairs daily functioning (social, occupational, academic)
- Causes significant distress
- Chronic and long-lasting without treatment
Core Features of Anxiety Disorders
Physical/Physiological Symptoms:
- Rapid heartbeat (palpitations, racing heart)
- Sweating (especially palms, underarms, forehead)
- Trembling or shaking
- Shortness of breath or feeling of being smothered
- Chest pain or discomfort
- Nausea or abdominal distress
- Dizziness, lightheadedness, or feeling faint
- Chills or heat sensations
- Numbness or tingling sensations (paresthesias)
- Muscle tension, especially in neck, shoulders, back
- Restlessness, feeling “on edge”
- Fatigue (from constant tension)
- Sleep disturbances (difficulty falling asleep, staying asleep)
Cognitive/Mental Symptoms:
- Excessive worry that’s difficult to control
- Sense of impending danger, panic, or doom
- Racing thoughts
- Difficulty concentrating (mind goes blank)
- Hypervigilance (constantly scanning for threats)
- Catastrophic thinking (expecting the worst)
- Intrusive thoughts (unwanted, repetitive thoughts)
- Fear of losing control or “going crazy”
- Fear of dying
- Rumination (repeatedly thinking about worries)
- Difficulty making decisions
Behavioral Symptoms:
- Avoidance of feared situations, objects, or activities
- Escape behaviors (leaving situations that provoke anxiety)
- Safety behaviors (actions to prevent feared outcome)
- Reassurance-seeking (repeatedly asking others for reassurance)
- Procrastination or task avoidance
- Social withdrawal or isolation
- Difficulty engaging in previously enjoyed activities
- Substance use (self-medication to cope with anxiety)
- Compulsive behaviors (checking, repeating actions)
Emotional Symptoms:
- Intense fear or terror
- Feeling overwhelmed
- Irritability
- Sense of dread
- Feeling tense or jumpy
- Emotional numbness (in chronic anxiety)
- Panic (sudden, intense fear)
The Anxiety Response: Fight-Flight-Freeze
Evolutionary Basis: Anxiety evolved as survival mechanism to protect us from danger
The Stress Response:
When Threat Detected:
- Amygdala (brain’s alarm system) identifies threat
- Signals hypothalamus (control center)
- Activates sympathetic nervous system
- Adrenal glands release stress hormones:
- Adrenaline (epinephrine): Immediate response
- Cortisol: Sustained response
Physiological Changes:
- Heart rate increases (pump blood to muscles)
- Breathing quickens (more oxygen)
- Blood flow redirected to muscles (away from digestion, causing nausea)
- Pupils dilate (see better)
- Sweating increases (cool body)
- Muscles tense (prepare for action)
- Non-essential functions shut down (digestion, immune system, reproduction)
Three Responses:
- Fight: Confronting the threat
- Flight: Escaping from threat
- Freeze: Becoming immobile (hoping threat passes)
In Anxiety Disorders: This system activates when no real danger exists, or response is excessive
Prevalence of Anxiety Disorders
Most Common Category of Mental Disorders:
- Affect approximately 30% of people at some point in life
- Current prevalence: ~15-20% of population
- More common than depression
- Often begin in childhood or adolescence
- Chronic if untreated
Gender Differences:
- Twice as common in females than males (2:1 ratio)
- Reasons unclear: May involve hormones, socialization, genetics, trauma exposure
Age of Onset:
- Many begin in childhood or adolescence
- Specific phobias: Often childhood
- Social anxiety: Typically adolescence
- GAD: Can begin any age, often young adulthood
- Panic disorder: Usually late adolescence to mid-30s
Comorbidity (Co-occurrence):
- Very high: 50-60% have multiple anxiety disorders
- Also commonly co-occur with:
- Depression (40-50%)
- Substance use disorders (20-30%)
- Other mental health conditions
Major Types of Anxiety Disorders in DSM-5
1. Specific Phobia
Definition: Intense, irrational fear of specific object or situation
Common Types:
- Animal type: Fear of animals (spiders, snakes, dogs, insects)
- Natural environment type: Fear of natural phenomena (heights, storms, water)
- Blood-injection-injury type: Fear of blood, needles, medical procedures
- Situational type: Fear of specific situations (flying, elevators, enclosed spaces, bridges)
- Other type: Fear of choking, vomiting, loud sounds, costumed characters
Key Features:
- Fear is excessive and unreasonable
- Exposure to phobic stimulus provokes immediate anxiety/panic
- Phobic situation is actively avoided or endured with intense distress
- Significantly interferes with life or causes marked distress
- Lasts 6 months or more
Prevalence: 7-9% of population; most common anxiety disorder
2. Social Anxiety Disorder (Social Phobia)
Definition: Intense fear of social situations where person may be scrutinized, judged, or embarrassed
Feared Situations:
- Public speaking or performing
- Meeting new people
- Eating or drinking in public
- Being center of attention
- Speaking in groups or classes
- Using public restrooms
- Attending social gatherings or parties
- Making phone calls in public
- Writing while being observed
Key Features:
- Fear of negative evaluation by others
- Fear of showing anxiety symptoms (blushing, trembling, sweating)
- Social situations almost always provoke anxiety
- Situations avoided or endured with intense distress
- Fear is out of proportion to actual threat
- Significantly impairs functioning
- Lasts 6 months or more
Subtypes:
- Performance-only: Fear limited to public speaking/performing
- Generalized: Fear of most social situations
Prevalence: 7-13% of population; often begins in adolescence
3. Panic Disorder
Definition: Recurrent, unexpected panic attacks with persistent worry about future attacks
Panic Attack: Sudden surge of intense fear/discomfort reaching peak within minutes, with at least 4 of 13 symptoms:
- Palpitations, racing heart
- Sweating
- Trembling or shaking
- Shortness of breath, feeling of being smothered
- Feeling of choking
- Chest pain or discomfort
- Nausea or abdominal distress
- Dizziness, lightheadedness, faint feeling
- Chills or heat sensations
- Numbness or tingling (paresthesias)
- Derealization (feelings of unreality) or depersonalization (feeling detached from oneself)
- Fear of losing control or “going crazy”
- Fear of dying
Types of Panic Attacks:
- Unexpected (uncued): Occur “out of the blue” without trigger
- Expected (cued): Occur in response to specific trigger or situation
Panic Disorder Requires:
- Recurrent unexpected panic attacks
- At least 1 month of worry about additional attacks or their consequences
- Maladaptive behavioral change (avoidance) due to attacks
With or Without Agoraphobia:
- Many develop agoraphobia: Fear/avoidance of situations where escape difficult or help unavailable if panic occurs
Prevalence: 2-3% of population; peak onset late teens to mid-30s
4. Agoraphobia
Definition: Fear of situations where escape difficult or help unavailable if panic-like symptoms occur
Feared Situations (at least 2 required):
- Using public transportation (buses, trains, planes, ships)
- Being in open spaces (parking lots, marketplaces, bridges)
- Being in enclosed spaces (shops, theaters, elevators)
- Standing in line or being in a crowd
- Being outside the home alone
Key Features:
- Situations are actively avoided or require companion
- Fear is out of proportion to actual danger
- Causes significant distress or impairment
- Lasts 6 months or more
- Can occur with or without panic disorder (now separate diagnoses)
Severe Cases: Housebound, unable to leave home
Prevalence: 1-2% of population
5. Generalized Anxiety Disorder (GAD)
Definition: Excessive, uncontrollable worry about multiple events or activities
Worry Characteristics:
- Excessive and difficult to control
- Occurs more days than not for at least 6 months
- About various events or activities (not limited to one topic)
- Person finds it difficult to control the worry
- Worry shifts from one topic to another
Common Worry Topics:
- Work or school performance
- Health of self and loved ones
- Finances
- Safety of family members
- Minor matters (being late, household chores)
- Responsibilities and competence
- Future events
Associated Symptoms (at least 3 required):
- Restlessness, feeling keyed up or on edge
- Being easily fatigued
- Difficulty concentrating, mind going blank
- Irritability
- Muscle tension
- Sleep disturbance (difficulty falling/staying asleep, restless unsatisfying sleep)
Key Features:
- Chronic, persistent worry
- Physical symptoms of tension
- Significant distress or impairment
- Not due to substance or medical condition
Often Called: “Worry disorder” or having “free-floating anxiety”
Prevalence: 3-5% of population; women affected twice as often as men
Separation Anxiety Disorder
Note: Primarily diagnosed in children but can occur in adults
Definition: Excessive fear or anxiety about separation from attachment figures
Key Features:
- Excessive distress when separation occurs or anticipated
- Persistent worry about losing attachment figures or harm befalling them
- Reluctance to go places (school, work) due to separation fear
- Nightmares about separation
- Physical complaints when separation occurs or anticipated
- Lasts at least 4 weeks in children (6 months in adults)
Prevalence: 4% of children; 1-2% of adults
Selective Mutism
Note: Primarily childhood disorder
Definition: Consistent failure to speak in specific social situations (where speaking expected) despite speaking in other situations
Not Anxiety Disorder in DSM-5: Now in own category but strongly associated with anxiety, particularly social anxiety
Common Features Across Anxiety Disorders
Excessive Fear and Anxiety:
- Central feature of all anxiety disorders
- Fear: Emotional response to real or perceived imminent threat
- Anxiety: Anticipation of future threat
Avoidance:
- All involve avoidance of feared situations, objects, or thoughts
- Avoidance maintains and worsens anxiety (prevents learning that fear is unfounded)
Physical Arousal:
- All involve sympathetic nervous system activation
- Similar physical symptoms across disorders (though intensity and triggers differ)
Functional Impairment:
- All cause clinically significant distress
- Interfere with daily functioning (social, occupational, academic)
Chronicity:
- Tend to be chronic (long-lasting) without treatment
- Wax and wane in intensity
- Often begin early in life
High Comorbidity:
- Frequently co-occur with each other
- Often co-occur with depression, substance use
Differences Between Anxiety Disorders
Primary Focus of Fear/Anxiety:
- Specific Phobia: Specific object or situation
- Social Anxiety: Social evaluation and scrutiny
- Panic Disorder: Panic attacks themselves
- Agoraphobia: Situations where escape difficult
- GAD: Multiple life circumstances (non-specific)
Triggers:
- Specific Phobia: Specific phobic stimulus
- Social Anxiety: Social situations
- Panic Disorder: Often no clear trigger (unexpected attacks)
- Agoraphobia: Specific situations where trapped
- GAD: Chronic, persistent (not triggered by specific situations)
Type of Anxiety:
- Specific Phobia: Intense fear in presence of phobic object
- Social Anxiety: Fear of embarrassment, negative evaluation
- Panic Disorder: Acute panic attacks
- Agoraphobia: Fear of being trapped or helpless
- GAD: Chronic, pervasive worry
Pattern:
- Specific Phobia: Situational (when encounter phobic stimulus)
- Social Anxiety: Situational (in social/performance situations)
- Panic Disorder: Episodic (attacks come and go)
- Agoraphobia: Situational (when in certain places)
- GAD: Constant, persistent (chronic baseline anxiety)
Risk Factors for Anxiety Disorders
Biological Factors:
- Genetics: Heritability 30-40%; runs in families
- Neurotransmitter imbalances: GABA (low), serotonin, norepinephrine
- Brain structure/function: Amygdala hyperactivity, prefrontal cortex underactivity
- Temperament: Behavioral inhibition (shy, fearful temperament in childhood)
- Medical conditions: Thyroid problems, heart conditions, respiratory disorders
Psychological Factors:
- Traumatic experiences: Abuse, accidents, disasters
- Stressful life events: Divorce, job loss, illness, death of loved one
- Parenting style: Overprotective, controlling, or rejecting parenting
- Learning: Observing others’ fears (modeling); direct negative experiences (conditioning)
- Cognitive style: Tendency to interpret situations as threatening
- Low self-esteem: Doubting ability to cope
- Perfectionism: Setting unrealistic standards
Environmental/Social Factors:
- Chronic stress: Ongoing stressors (financial, relationship, work)
- Trauma exposure: Especially in childhood
- Cultural factors: Some cultures express/experience anxiety differently
- Substance use: Can trigger or worsen anxiety
- Lack of social support: Isolation increases vulnerability
Course and Impact
Typical Course Without Treatment:
- Chronic and persistent
- Waxing and waning (periods of worse and better symptoms)
- May lead to secondary problems:
- Depression (very common)
- Substance abuse (self-medication)
- Physical health problems (stress on body)
- Relationship difficulties
- Academic/occupational impairment
Impact on Life:
- Education: School avoidance, poor academic performance
- Work: Decreased productivity, absenteeism, limited career choices
- Relationships: Social isolation, relationship strain, difficulty forming close relationships
- Physical health: Weakened immune system, cardiovascular problems, chronic pain
- Quality of life: Severely diminished; activities avoided, opportunities missed
Positive Note: Anxiety disorders are highly treatable; most people improve significantly with appropriate treatment
Relationship Between Anxiety and Depression
Very High Comorbidity: 40-60% of those with anxiety disorder also have depression
Possible Relationships:
- Sequential: Anxiety often comes first, followed by depression (chronic anxiety leads to demoralization)
- Shared vulnerability: Common underlying factors (genetics, neurotransmitters, life stress)
- Symptom overlap: Some symptoms similar (sleep problems, concentration difficulties, restlessness/agitation)
- Shared risk factors: Stress, trauma, negative thinking patterns
Anxiety-Depression Continuum: Some researchers view as related conditions on spectrum
Cultural Considerations
Expression of Anxiety Varies by Culture:
- Western cultures: Often psychological/emotional focus
- Non-Western cultures: Often somatic (physical symptom) focus
Culture-Specific Syndromes:
- Taijin kyofusho (Japan): Fear of offending others through one’s appearance or actions
- Ataque de nervios (Latin America): Intense emotional episode with anxiety, anger, dissociation
- Susto (Latin America): Fright-induced illness
Cultural Factors Affect:
- What situations provoke anxiety
- How anxiety is expressed (psychological vs. physical)
- Whether treatment is sought
- What treatments are acceptable
Key Points for Exams
- Anxiety disorders are most common category of mental disorders (~30% lifetime prevalence)
- Twice as common in females than males
- Five major anxiety disorders: Specific Phobia, Social Anxiety Disorder, Panic Disorder, Agoraphobia, GAD
- All involve: Excessive fear/anxiety, avoidance, physical arousal, functional impairment
- Differ in: Focus of fear, triggers, pattern (situational vs. chronic)
- Specific Phobia: Fear of specific object/situation; most common anxiety disorder
- Social Anxiety: Fear of social scrutiny and negative evaluation
- Panic Disorder: Recurrent unexpected panic attacks with worry about future attacks
- Agoraphobia: Fear of situations where escape difficult (can occur with/without panic disorder)
- GAD: Excessive, uncontrollable worry about multiple concerns; chronic and pervasive
- High comorbidity: With each other, with depression, with substance use
- Chronic without treatment but highly treatable
- Risk factors: Genetics, temperament, trauma, stress, learning, cognitive style
- Fight-flight-freeze response: Evolutionary survival mechanism; overactive in anxiety disorders