Anxiety, Trauma-, and Stressor-Related Disorders: Comprehensive Study Notes

Anxiety, Trauma-, and Stressor-Related Disorders

Introduction to Anxiety

Anxiety is a common emotion characterized by physical symptoms and/or thoughts or worries that something bad will happen. It is a future-oriented response, typically occurring when individuals encounter new situations or anticipate life-changing events. While anxiety is usually time-limited and resolves after the event, it can become problematic when persistent or excessive.

• Definition: A state of apprehension, tension, or uneasiness from anticipation of danger, the source of which is largely unknown or unrecognized.

• Key Features: Physical symptoms, negative cognitions, subjective distress, and behavioral avoidance.

• Example: Feeling nervous before a public speech or a major exam.

Fight-or-Flight Response

The fight-or-flight response is a physiological reaction to perceived threats, involving the activation of the sympathetic nervous system.

• Activation: Triggered by stress or fear.

• Physiological Effects: Increased heart rate, enhanced muscle activity, increased respiration.

• Counteraction: The parasympathetic system restores the body to a calm state.

Components of Anxiety

Anxiety consists of several interrelated components:

• Physical Symptoms: Sweating, trembling, rapid heartbeat.

• Negative Cognitions/Subjective Distress: Worry, fear of losing control.

• Escape or Avoidance Behavior: Avoiding feared situations or objects.

• Panic Attacks: Sudden, intense episodes of fear.

• Worry: Persistent, excessive concern about potential threats.

The Continuum of Anxiety: When Does It Become a Disorder?

While anxiety is a normal experience, it becomes a disorder when it leads to significant functional impairment or distress. Diagnosis considers:

• Functional Impairment: Interference with daily life.

• Developmental Age: Appropriateness of symptoms for age.

• Sociodemographic Factors: Prevalence and presentation may vary by race, gender, and culture.

Anxiety Disorders: Definitions and Prevalence

Anxiety disorders are a group of mental disorders characterized by excessive fear, anxiety, and related behavioral disturbances. They are the most common class of mental disorders, with a lifetime prevalence of 33.7% among adults in the United States. Comorbidity with depression is high (72%).

• Average Age of Onset: 21.3 years

• Impact: Economic burden, personal suffering, reduced quality of life

Types of Anxiety Disorders

• Panic Attacks

• Panic Disorder

• Agoraphobia

• Generalized Anxiety Disorder (GAD)

• Social Anxiety Disorder

• Selective Mutism

• Specific Phobia

• Separation Anxiety Disorder

Panic Attacks

Panic attacks are discrete periods of intense fear and physical arousal that develop abruptly and peak within minutes. They involve both somatic and cognitive symptoms. About 25% of people experience a panic attack at some point.

• Types: Expected (triggered by specific cues) and unexpected (no obvious trigger).

• Example: Sudden onset of heart palpitations, sweating, and fear of dying.

Panic Disorder

Panic disorder is characterized by recurrent, unexpected panic attacks followed by at least one month of persistent worry about future attacks or behavioral changes related to the attacks.

• Prevalence: 4.7% lifetime

• Most Affected: Individuals aged 30–59

• Cross-cultural Presence: Found across different cultures

Agoraphobia

Agoraphobia involves fear or anxiety in at least two of five situations: public transportation, open spaces, enclosed spaces, standing in line or being in a crowd, or being outside the home alone. It often develops after panic disorder.

• Common Fears: Dizziness, falling, losing control, disorientation

Generalized Anxiety Disorder (GAD)

GAD is characterized by long-term, excessive worry occurring more days than not for at least six months. It is more common in adults and in high-income countries.

• Prevalence: 3.7–5.7% in adults, 2.2% in adolescents

Social Anxiety Disorder

Social anxiety disorder is marked by a significant fear of social situations involving possible scrutiny by others. It can be performance-only or more generalized.

• Distressing Situations: Speaking, eating, drinking, writing in public, social interactions

• Prevalence: Onset at age 13, more common in women, high comorbidity with other disorders

• Demographics: More common in non-Hispanic White individuals

Selective Mutism

Selective mutism is the consistent failure to speak in specific social situations despite the ability to speak, typically found in children aged 3–5 years. It is often comorbid with other anxiety disorders and affects about 1% of the population.

Specific Phobia

Specific phobia is a marked fear or anxiety about a specific object or situation, leading to significant disruption in daily functioning. Diagnosis requires significant emotional distress and functional impairment.

• Types: Animal, natural environment, blood-injection-injury, situational, other

• Prevalence: 6.8–12.5% of the general population, average onset at age 8

• Demographics: More common in women and young children

Type of Phobia	Prevalence (%)
Animals	~5
Heights	~5
Blood/Injection/Injury	~3
Enclosed Spaces	~3
Other	Varies

Separation Anxiety Disorder

Separation anxiety disorder is characterized by developmentally inappropriate and excessive anxiety concerning separation from attachment figures. It is more common in children and may lead to other anxiety disorders.

• Symptoms: Worry about harm to self or caregiver, refusal to separate, physical symptoms, nightmares

• Prevalence: 4.8% lifetime

Posttraumatic Stress Disorder (PTSD)

PTSD is an intense psychological and physiological reaction to events that symbolize or represent a previously experienced traumatic event. It is more common in women, combat veterans, and certain ethnic groups.

• Prevalence: 4–7% in the U.S.

• Symptoms: Intrusion, negative alterations in cognition/mood, hyperarousal, hypervigilance, exaggerated startle, avoidance

• Comorbidity: 50% overall, 83% in veterans

Etiology of Anxiety Disorders

Biological Perspective

• Genetics: Anxiety disorders run in families; heritability is high but not absolute.

• Neurobiology: Differences in brain functioning, especially in the amygdala, limbic system, and prefrontal cortex. Reduced connectivity between limbic system and prefrontal cortex. Neurotransmitters such as serotonin and GABA are important.

Psychological Perspective

• Psychodynamic Theories: Unconscious conflicts give rise to symptoms; therapy aims to uncover and resolve these conflicts.

• Behavioral Theories: Fear is acquired through classical conditioning, vicarious learning, or information transmission.

• Cognitive Theories: Inaccurate interpretation of events, maladaptive thinking, and anxiety sensitivity (belief that anxiety symptoms will have negative consequences). The "fear of fear" model describes a vicious cycle of worry and hypersensitivity to bodily sensations.

Treatments for Anxiety Disorders

Biological Treatments

• SSRIs (Selective Serotonin Reuptake Inhibitors): Prozac, Zoloft, Celexa, Lexapro

• SNRIs (Selective Norepinephrine Reuptake Inhibitors): Cymbalta, Effexor, Pristiq

• Benzodiazepines: Valium, Xanax (enhance GABA activity, but risk dependence)

Psychological Treatments

• Psychodynamic Therapy: Goal setting, identifying core conflicts, modifying defenses and avoidance

• Behavioral and Cognitive-Behavioral Therapy (CBT): Most effective; includes exposure therapy (in vivo, imaginal, virtual reality), cognitive restructuring, and social skills training

• Specialized Therapies for PTSD: Cognitive processing therapy (CPT), eye movement desensitization and reprocessing (EMDR)

• Mindfulness and Acceptance and Commitment Therapy (ACT): Focus on present-moment awareness and acceptance of thoughts/feelings

Virtual Reality in Treatment

Virtual reality technologies provide immersive experiences for exposure therapy, particularly useful for anxiety disorders and PTSD.

Additional info: These notes synthesize textbook and lecture slide content, expanding on definitions, prevalence, etiology, and treatment for major anxiety and trauma-related disorders as outlined in a college-level psychology curriculum.