Obsessive Compulsive and Related Disorders

The OCD Spectrum

The "OCD Spectrum" encompasses a group of related conditions characterized by intrusive thoughts or repetitive behaviors, including:

• Obsessive-Compulsive Disorder (OCD).

• Body Dysmorphic Disorder (BDD).

• Hoarding Disorder.

• Trichotillomania (Hair-pulling disorder).

• Excoriation Disorder (Skin-picking disorder).

Conceptual Overview of Suffering and Fear

• Philosophical Context: The transcript includes a quote by Thomas Merton: "The more you try to avoid suffering, the more you suffer because smaller things begin to torture you in proportion to your fear of suffering."

The OCD Cycle

OCD is characterized by a self-perpetuating cycle consisting of four main stages:

1. Obsession: Unwanted thoughts, images, or urges that cause an individual anxiety, disgust, and/or distress.

2. Distress: The emotional and psychological impact of the obsession.

3. Compulsion: Physical or mental behaviors, or the avoidance of triggers, intended to provide relief.

4. Relief: A short-term reduction in anxiety that ultimately reinforces and perpetuates the OCD cycle.

Clinical Definitions and Characteristics of OCD

• Obsessions: These are defined as intrusive thoughts. Common themes include:

  • Contamination and illness.

  • Scrupulosity (religious or moral OCD).

  • Relationship OCD.

  • Incest OCD.

  • Sexually aggressive OCD.

• Intrusive Thoughts and Values:

  • The subject of a person's obsessions is often directly linked with what they value most in life, making the thoughts especially distressing.

  • Individuals struggle with the question: "Does having this thought mean that I want to act on it?"

  • Thoughts often involve harming others or engaging in other appalling acts.

• Ego-Dystonic Nature:

  • OCD is an ego-dystonic disorder.

  • The transcript states: "They do want to experience these thoughts." (Note: This commonly implies the thoughts are perceived as intrusive and unwanted, appearing opposite to the person's self-image).

  • Patients typically have insight into their thoughts and actions, yet they cause functional impairment.

Pathophysiology of OCD

• Neuronal Loop Dysfunction: OCD involves a dysfunction of the neuronal loop.

• Brain Regions Involved:

  • Orbitofrontal Cortex: This area is active and associated with worry and fear.

  • Basal Ganglia: There is an overactive excitatory pathway in the basal ganglia.

• The "Danger Sensation": In patients with OCD, the sensation of "danger" is not relieved, leading to persistent obsession over thoughts.

DSM-5 Diagnostic Criteria for OCD

1. Presence of Symptoms: Presence of obsessions, compulsions, or both.

2. Time and Impact: The obsessions or compulsions must be time-consuming (>1\,\text{hour/day}) or cause clinically significant distress or impairment in social, occupational, or other important areas of functioning.

3. Exclusion: The symptoms must not be attributable to a substance or another medical condition.

Compulsions (Rituals)

• Definition: Repetitive behaviors or mental actions that the individual feels driven to perform in response to an obsession, or according to rules that must be applied rigidly.

• Purpose: These actions are not pleasurable but allow temporary relief from anxiety or distress.

• Common Compulsions:

  • Checking.

  • Cleaning.

  • Rituals.

  • Avoidance.

  • Neutralization.

  • Reassurance seeking.

  • Planning.

Specifiers

• Insight Levels:

  • With good or fair insight.

  • With poor insight.

  • With absent insight/delusional beliefs.

• Tic-related: Specify if there is a current or past history of a tic disorder.

Yale-Brown Obsessive Compulsive Scale (Y-BOCS)

The Y-BOCS is a clinical tool used to assess symptom severity. It uses a scoring system from $0$ to $4$ for ten specific questions.

Assessment of Obsessions

1. Time Spent: How much time is spent on obsessive thoughts? ($0-1$, $1-3$, $3-8$, or >8\,\text{hrs/day}).

2. Interference: How much do obsessive thoughts interfere with personal, social, or work life?

3. Distress: How much do obsessive thoughts distress the individual?

4. Resistance: How hard does the individual try to resist the obsessions?

5. Control: How much control does the individual have over the obsessive thoughts?

Assessment of Compulsions

6. Time Spent: How much time is spent performing compulsive behaviors? ($0-1$, $1-3$, $3-8$, or >8\,\text{hrs/day}).

7. Interference: How much do compulsive behaviors interfere with life?

8. Anticipated Anxiety: How anxious would the individual feel if prevented from performing the compulsion?

9. Resistance: How hard does the individual try to resist the compulsions?

10. Control: How much control does the individual have over the compulsive behaviors?

Treatment of OCD

Management typically involves a combination of psychotherapy and pharmacotherapy.

Exposure and Response Prevention (ERP)

• Gold Standard: ERP is the gold standard psychotherapy for OCD.

• Mechanism: It involves exposing the patient to triggers and preventing the subsequent compulsive response.

Pharmacotherapy

• Primary Medication Class: SSRIs (Selective Serotonin Reuptake Inhibitors).

• Dosing: The highest doses are usually necessary for therapeutic effect.

• First-line SSRIs: Fluoxetine, paroxetine, sertraline.

• Second-line SSRIs: Fluvoxamine (associated with more side effects).

• Duration of Trial: Clinics must try the maximum dose for at least $6\,\text{weeks}$ before declaring a "failure."

• Expected Results: Medication typically leads to a $30\%$ reduction in symptoms. While monotherapy reduces impairment, the ultimate goal of treatment is the total elimination of symptoms.

Body Dysmorphic Disorder (BDD)

• Prevalence: $2\%$ lifetime prevalence.

• Demographics: Equal distribution between males and females ($M = F$).

• Etiology: Associated with childhood neglect and abuse.

• Clinical Settings: Higher prevalence among dermatology and plastic surgery patients. Patients may seek plastic surgery and remain unsatisfied, requiring psychological clearance.

• Risk: High suicide risk.

• DSM-5 Specifiers:

  • Muscle Dysmorphia: Preoccupancy with the idea that the body build is too small or insufficiently muscular.

  • Insight Specifiers: Good/fair, poor, or absent insight (delusional beliefs).

Hoarding Disorder

• Prevalence: $2-6\%$ of the general population; makes up $30\%$ of the OCD population.

• Etiology: Often a response to trauma, childhood food poverty, or previous abandonment.

• Social Impact: Conflicts with neighbors and frequent evictions.

• Motivation for Hoarding: Perceived utility, aesthetic value, or sentimental value.

• DSM-5 Diagnosis:

  • Persistent difficulty parting with possessions regardless of value.

  • Perceived need to save items and distress associated with discarding them.

  • Accumulation clutters living areas and compromises their intended use.

  • If areas are clean, it is only due to the intervention of third parties.

• Diagnosis Specifiers:

  • Excessive acquisition: Difficulty discarding possessions accompanied by acquiring items for which there is no space.

  • Insight levels: Good/fair or absent insight/delusional beliefs.

• Treatment: Cognitive Behavioral Therapy (CBT) and addressing underlying trauma.

Trichotillomania

• Definition: Recurrent pulling out of one's hair resulting in hair loss, despite repeated attempts to stop.

• Purpose: Hair pulling often relieves anxiety or distress.

• Prevalence: $1-2\%$, significantly higher in females (F > M).

• Common Areas: Scalp, eyebrows, and eyelashes.

• Physical Exam Findings:

  • Irregularly-shaped patches of alopecia; hair may feel stubbly.

  • Hair loss patterns vary from mild thinning to complete baldness.

  • Broken or absent eyelashes and brows.

Excoriation Disorder (Skin Picking Disorder)

• Definition: Recurrent skin picking resulting in lesions or tissue damage and impairment in social functioning.

• Demographics: Female to male ratio is $8:1$. Age of onset is $15-45$ years.

• Etiology: Possibly a maladaptive response to an emotional trigger.

• Common Areas: Face, arms, and hands.

• Associated Conditions:

  • In college students, it is associated with high lifetime rates of anxiety, eating, substance use, and impulse control disorders.

  • Common feature of Prader-Willi syndrome (Chromosome $15$ abnormality).

  • Also seen in autism spectrum, intellectual disability, schizophrenia, and Tourette syndrome.

• Physical Exam Findings:

  • Excoriated lesions of varying size, extent, and severity.

  • Presence of new lesions alongside older ones that may be crusted, scarred, or nodular.

• Complications: Ulcers, scars, infection, and disfigurement.

• Differential Diagnosis (DDX): OCD, Body Dysmorphic Disorder, eczema, psoriasis, scabies.

Treatment of Excoriation Disorder

• Psychotherapy: Habit reversal therapy.

• Pharmacotherapy: Antidepressants and N-acetylcysteine.

• Topical Care:

  • Treating skin lesions.

  • Topical steroids to reduce inflammation.

  • Topical antibiotics for secondary infections.