Schizophrenia Spectrum and Other Psychotic Disorders

Psychotic disorders are characterized by disturbances in thinking, perception, emotions, and behavior, often involving delusions, hallucinations, disorganized speech, and impaired functioning.

1. Schizophrenia

Core Features (Lasting ≥6 months):

  • At least two of the following, with one being (a), (b), or (c):
    • (a) Delusions (fixed false beliefs, e.g., paranoia, grandiosity).
    • (b) Hallucinations (usually auditory, e.g., voices commenting).
    • (c) Disorganized speech (incoherent, tangential).
    • (d) Grossly disorganized or catatonic behavior.
    • (e) Negative symptoms (reduced emotional expression, avolition).
  • Social/occupational dysfunction (work, relationships, self-care decline).

Subtypes (DSM-5 removed these, but still clinically relevant):

  • Paranoid (delusions/hallucinations dominate).
  • Disorganized (speech/behavior chaotic).
  • Catatonic (motor immobility or excessive movement).
  • Residual (negative symptoms persist after psychosis fades).

2. Schizophreniform Disorder

  • Symptoms identical to schizophrenia but last 1–6 months.
  • Good prognostic features: Rapid onset, confusion, good premorbid functioning.

3. Brief Psychotic Disorder

  • Sudden onset of psychotic symptoms (delusions, hallucinations, disorganization).
  • Lasts 1 day to 1 month, with eventual full recovery.
  • Often triggered by extreme stress (e.g., trauma, childbirth—postpartum psychosis).

4. Delusional Disorder

  • Fixed delusions (non-bizarre) for ≥1 month, without other psychotic symptoms.
  • Types:
    • Erotomanic (believes someone is in love with them).
    • Grandiose (inflated self-worth, special powers).
    • Jealous (convinced partner is unfaithful).
    • Persecutory (being conspired against).
    • Somatic (false bodily beliefs, e.g., parasites under skin).

5. Schizoaffective Disorder

  • Psychosis + Mood Episodes (depressive or manic).
  • Psychotic symptoms must persist ≥2 weeks without mood symptoms.
  • Two subtypes:
    • Bipolar type (mania present).
    • Depressive type (only major depressive episodes).

6. Other Psychotic Disorders

  • Substance/Medication-Induced Psychotic Disorder (from drugs, alcohol, steroids).
  • Psychotic Disorder Due to Another Medical Condition (e.g., brain tumor, epilepsy, lupus).

Causes & Risk Factors

  • Genetic (↑ risk if family history).
  • Neurobiological (dopamine dysregulation, brain structure changes).
  • Environmental (childhood trauma, urban living, cannabis use in adolescence).
  • Prenatal (viral infections, malnutrition during pregnancy).

Diagnosis

  • Clinical interview (psychiatric evaluation).
  • Rule out:
    • Medical causes (thyroid disorders, seizures).
    • Drug use (stimulants, hallucinogens).
    • Mood disorders (bipolar with psychotic features).
  • Imaging/Labs (MRI, EEG, drug screen if needed).

Treatment

1. Medications

  • Antipsychotics (1st-gen: haloperidol; 2nd-gen: risperidone, olanzapine, clozapine).
  • Mood stabilizers (if schizoaffective).

2. Psychotherapy

  • Cognitive Behavioral Therapy for Psychosis (CBTp) – Challenges delusional beliefs.
  • Social Skills Training – Improves communication/functioning.
  • Family Therapy – Reduces relapse risk.

3. Rehabilitation & Support

  • Assertive Community Treatment (ACT) – Intensive case management.
  • Supported Employment/Housing – Helps maintain independence.

Prognosis

  • 20-30% achieve significant recovery.
  • 50% have episodic symptoms.
  • 20-30% remain chronically impaired.
  • Best outcomes with early intervention (first-episode psychosis programs).

When to Seek Help

  • Early warning signs: Social withdrawal, odd beliefs, neglect of hygiene.
  • Acute psychosis: Hallucinations, paranoia, incoherent speech.

A psychiatrist should evaluate if psychotic symptoms are present.