Comprehensive Study Notes on Anxiety, Panic, and Specific Phobias

Key Terminology: Anxiety, Fear, and Panic

• Anxiety:

  • Definition: A future-oriented negative mood state characterized by bodily symptoms of physical tension and apprehension about the future.
  • Involves a subjective sense of unease.
  • Behavioral signs:
  • Fidgeting.
  • Restlessness.
  • Trembling.
  • Physiological signs:
  • Increased heart rate.
  • Muscle tension.
  • Sleep difficulties.

• Fear:

  • Definition: An immediate alarm reaction to danger.
  • Physiological signs:
  • Increased heart rate.
  • Increased blood pressure.
  • Physiological activation: Triggers the fight, flight, or freeze response.

• Panic:

  • Definition: Sudden, overwhelming feelings of fright or terror.

• Panic Attack:

  • Definition: An abrupt experience of intense fear or acute discomfort accompanied by physical symptoms.

Biological Contributors, Neurotransmitters, and Comorbidity

• Biological & Neurotransmitter Factors:

  • Gamma-Aminobutyric Acid (GABA):
  • Decreased levels of GABA are associated with anxiety.
  • Pharmacological treatment: Benzodiazepines (e.g., Xanax) increase GABA activity.
  • Serotonin:
  • Decreased levels of serotonin are associated with anxiety and worry.
  • Pharmacological treatment: Antidepressants (e.g., Prozac) increase available serotonin.

• Comorbidities of Anxiety and Related Disorders:

  • Comorbidity rate: High rates of comorbidity ranging from $55\%$ to $76\%$.
  • Common underlying features and vulnerabilities:
  • Low self-esteem.
  • Pessimistic cognitive style.
  • Shared psychological vulnerabilities.
  • Links to physical disorders:
  • Comorbid physical diagnosis paired with Generalized Anxiety Disorder (GAD) results in increased suffering and significantly poorer quality of life.
  • Suicide attempt rates:
  • $20\%$ of individuals diagnosed with panic disorder attempt suicide.

Generalized Anxiety Disorder (GAD)

• Diagnostic Criteria:

  • Excessive anxiety and worry occurring more days than not for at least $6\,\text{months}$ regarding a number of events or activities.
  • The individual finds it difficult to control the worry.
  • The anxiety and worry are associated with at least $3$ or more of the following $6$ symptoms:
  • Restlessness or feeling keyed up or on edge.
  • Being easily fatigued.
  • Difficulty concentrating or mind going blank.
  • Irritability.
  • Muscle tension.
  • Sleep disturbance.
  • The anxiety, worry, or physical symptoms cause clinically significant distress or impairment in social, occupational, or other important areas of functioning.
  • The disturbance is not attributable to the physiological effects of a substance or another medical condition.
  • The disturbance is not better explained by another mental health disorder.

• Etiology and Causes:

  • Generalized Biological Vulnerability:
  • Characterized by less physiological responsiveness to stress.
  • Blunted or lesser elevations in heart rate or blood pressure.
  • Low cardiac vagal tone leading to autonomic inflexibility.
  • Cognitive and Chronic Tension Factors:
  • Chronically tense state associated with cognitive processes, specifically threat appraisal.
  • Exaggerated sensitivity to threat.
  • Vigilantly scanning the environment for threats.
  • Energy suck: Exhausts physical and mental energy on avoiding or identifying threats, leaving minimal energy to apply toward problem resolution.
  • Results in experiencing both physiological and emotional burnout.

• Treatment Modalities:

  • Pharmacotherapy / Drug Therapy:
  • Better for short-term symptom relief.
  • Benzodiazepines: Effective in the short term, but present significant problems such as physical addiction.
  • Antidepressants: The drug therapy of choice; effective but not perfect, and can still cause some impairment.
  • Psychological Therapy:
  • Produces superior long-term results.
  • Cognitive Restructuring: Primary treatment approach focused on identifying and altering negative automatic thoughts into healthy, adaptive thoughts.
  • Relaxation Techniques: Limited in terms of overall clinical effectiveness.
  • New Wave Techniques: Focus on developing distress tolerance and acceptance skills through Dialectical Behavior Therapy (DBT).

Panic Disorder and Agoraphobia

• Clinical Presentation:

  • Regardless of treatment status, individuals with panic disorder are frequently categorized as "frequent flyers" in healthcare settings.

• Panic Disorder Diagnostic Criteria:

  • Recurrent unexpected panic attacks, defined as abrupt surges of intense fear or intense discomfort.
  • Diagnosis requires the presence of at least $4$ of the following $12$ symptoms during an attack:
  • Palpitations, pounding heart, or accelerated heart rate.
  • Sweating.
  • Trembling or shaking.
  • Sensations of shortness of breath or smothering.
  • Feelings of choking.
  • Chest pain or discomfort.
  • Nausea or abdominal distress/pain.
  • Feeling dizzy, unsteady, lightheaded, or faint.
  • Paresthesias (numbness or tingling sensations).
  • Derealization (feelings of unreality) or depersonalization (being detached from oneself).
  • Fear of losing control or going crazy.
  • Fear of dying.
  • Follow-up criteria:
  • At least one attack has been followed by $1\,\text{month}$ or more of one or both of the following:
    • Persistent concern or worry about additional panic attacks or their consequences.
    • A significant maladaptive change in behavior related to the attacks.
  • The disturbance is not attributable to the physiological effects of a substance or another medical condition.
  • The disturbance is not better explained by another mental disorder.

• Agoraphobia Diagnostic Criteria:

  • Marked fear or anxiety about $2$ or more of the following $5$ situations:
  • Using public transportation.
  • Being in open spaces.
  • Being in enclosed spaces.
  • Standing in line or being in a crowd.
  • Being outside of the home alone.
  • The individual fears or avoids these situations due to thoughts that escape might be difficult or help might not be available in the event of developing panic-like symptoms or other incapacitating or embarrassing symptoms.
  • The agoraphobic situations almost always provoke fear or anxiety.
  • Agoraphobic situations are actively avoided, require the presence of a companion, or are endured with intense fear or anxiety.
  • The fear or anxiety is out of proportion to the actual danger posed by the agoraphobic situations and to the sociocultural context.
  • The fear, anxiety, or avoidance is persistent, typically lasting for $6\,\text{months}$ or more.
  • Causes clinically significant distress or impairment in social, occupational, or other important areas of functioning.
  • If another medical condition is present, the fear, anxiety, or avoidance is clearly excessive.
  • The disturbance is not better explained by the symptoms of another mental disorder.

Panic Disorder and Agoraphobia Statistics, Etiology, and Treatment

• Panic Disorder Statistics:

  • Annual prevalence rate: $2.7\%$.
  • Lifetime prevalence rate: $4.7\%$.
  • Sex ratio: $2$ out of $3$ cases ($\approx 66.7\%$) are women.
  • Male presentation: Men underreport symptoms and frequently self-medicate.
  • Age of onset: Most common in young adults aged $20$ to $24\,\text{years}$; onset is typically acute.

• Agoraphobia Statistics:

  • Annual prevalence rate: $0.9\%$.
  • Lifetime prevalence rate: $1.3\%$.
  • Development without Panic Disorder: Only $1.4\%$ of individuals develop agoraphobia without a preexisting Panic Disorder (PD) diagnosis.
  • Sex ratio: Less than $75$ cases (or $75\%$) are women.

• Etiology of Panic Disorder:

  • Genetic Factors: Inherited vulnerability to stress, leading to an overreactive emergency alarm reaction to stress.
  • Behavioral / Conditioning Factors: Learned alarms associated with internal cues (e.g., increased heart rate) and external cues (e.g., specific locations associated with prior panic attacks).
  • Cognitive Distortions: Faulty information processing systems characterized by catastrophizing or rumination.

• Treatment Approaches:

  • Pharmacotherapy:
  • Selective Serotonin Reuptake Inhibitors (SSRIs) (e.g., Prozac): Increases available serotonin in the system; results in sexual dysfunction in $75\%$ of patients.
  • Benzodiazepines (e.g., Xanax): Increases GABA levels to reduce physiological symptoms; easily produces physical addiction.
  • Relapse rates: High rates of symptom reduction while adhering to drug therapy, but a $90\%$ relapse rate occurs upon medication discontinuation.
  • Psychological / Behavioral Therapy:
  • Behavioral Therapy: Panic Control Treatment (PCT) utilizes gradual exposure combined with adaptive coping strategies.
  • Cognitive Behavioral Therapy (CBT): Used to identify and replace distorted cognitions (such as catastrophizing thoughts).
  • Efficacy: Provides the best long-term results. Psychiatric medications can interfere with cognitive functioning and act as a barrier to psychological treatment.

Specific Phobia Diagnostic Criteria and Specifiers

• Diagnostic Criteria for Specific Phobia:

  • Marked fear or anxiety about a specific object or situation.
  • The phobic object or situation almost always provokes immediate fear or anxiety.
  • The phobic object or situation is actively avoided or endured with intense fear or anxiety.
  • The fear or anxiety is out of proportion to the actual danger posed by the specific object or situation and to the sociocultural context.
  • The fear, anxiety, or avoidance is persistent, typically lasting for $6\,\text{months}$ or more.
  • Causes clinically significant distress or impairment in social, occupational, or other important areas of functioning.
  • The disturbance is not better explained by the symptoms of another mental health disorder.

• Phobic Type Specifiers:

  • Blood-Injection-Injury Specifier:
  • Set of phobic responses oriented around physical harm and medical treatment.
  • Salient genetic component.
  • Characterized by a vasovagal response causing a drop in blood pressure and a tendency to faint.
  • Average age of onset: Around $9\,\text{years}$ of age.
  • Situational Specifier:
  • Fear of public transportation or enclosed places.
  • Two common situational phobias: Claustrophobia and fear of flying.
  • Panic symptoms are frequently experienced when exposed to the feared situation.
  • Natural Environment Specifier:
  • Fears of situations or events occurring in nature (e.g., hurricanes, earthquakes, deep water, high places).
  • Avoidant responses often lead to social seclusion or stymie social development.
  • Animal Specifier:
  • Fear of animals or insects.
  • Common in the general population, but only diagnosed as a phobia if it interferes with daily functioning.
  • Must be distinguished from simple revulsion.
  • Other Specifier:
  • Fear of stimuli not encapsulated by the above specifiers.

Specific Phobia Statistics, Etiology, and Treatment

• Statistics:

  • Annual prevalence rate: $8.7\%$.
  • Lifetime prevalence rate: $12.5\%$.
  • Sex ratio: Women outweigh men $4:1$ (or $4.1$), except for the fear of heights.
  • Course: Chronic course, with onset typically occurring in childhood.
  • Multiplicity of phobias: Common for individuals to have multiple phobias; $75\%$ of individuals with a specific phobia fear more than one situation or object, with most fearing at least $3$ objects or situations.

• Etiology and Behavioral Conditioning Process:

  1. Initial conditioning occurs, linking fear to a specific object, event, or situation.
  2. Fear development is heightened based upon genetic inheritance and/or observational learning/modeling from parental or guardian figures.
  3. Vulnerability is strengthened to the point where individuals begin to fear that the traumatic event will happen again.
  4. Development of an avoidant coping response exacerbates and sustains the fear.

• Treatment Modalities:

  • Behavioral Therapy (Gold Standard):
  • Structured and consistent exposure-based exercises.
  • Step 1: Establish a fear hierarchy.
  • Step 2: Expose the client to each level of fear gradually (gradual exposure) or all at once (wholesale / flooding).
  • Step 3: Strictly limit escape behaviors during exposure.
  • Step 4: Teach adaptive coping responses.
  • Unique Intervention for Blood-Injection-Injury Phobia:
  • Teach muscle tension techniques (progressive muscle relaxation) during exposure to counteract the vasovagal faint response.

Differential Diagnosis Rules of Thumb

• Agoraphobia vs. Situational Specific Phobia:

  • Situational specific phobias can closely resemble agoraphobia in clinical presentation.
  • Rule of Thumb 1: If $2$ or more agoraphobic situations are feared, agoraphobia is the primary likely diagnosis.
  • Rule of Thumb 2: Examination of the core focus of anxiety determines the diagnosis:
  • Specific Phobia: Driven by fear of being physically harmed by the object or situation.
  • Agoraphobia: Driven by fear of not being able to escape or fear that help will not be immediately accessible.

• Panic Disorder vs. Specific Phobia:

  • Rule of Thumb: Determine when and how panic symptoms occur:
  • Specific Phobia: Panic symptoms occur strictly in direct response to a specific object or event.
  • Panic Disorder: Panic symptoms occur unexpectedly without an immediate specific external trigger.