Understanding Schizophrenia

Definition and Misconceptions

• Schizophrenia:
  • "Schizo" means split, "phrenia" refers to the mind.
  • Misunderstood as split personality; actually refers to fragmented thinking.

Symptoms of Schizophrenia

• Syndrome: A collection of symptoms, different patients may experience different symptoms.
• Categories of Symptoms:
  • Positive Symptoms:
    • New features without a normal physiological counterpart.
    • Includes psychotic symptoms: delusions, hallucinations, disorganized speech, disorganized/catatonic behavior.
    • Delusions: Strong false beliefs that are resistant to evidence.
      • Types: Control, Reference.
    • Hallucinations: Perceptions without stimuli, can be auditory or visual.
    • Disorganized Speech: Random jumbling of words (e.g., "word salad").
    • Disorganized Behavior: Bizarre, purposeless actions (e.g., wearing multiple jackets in summer).
    • Catatonic Behavior: Issues with movement, posture, and responsiveness.
  • Negative Symptoms:
    • Reduction/removal of normal processes.
    • Flat Affect: Lack of appropriate emotional response.
    • Alogia: Poverty of speech.
    • Avolition: Decreased motivation for goals.
  • Cognitive Symptoms:
    • Difficulties remembering, learning, or understanding.
    • Subtle, require specific tests to detect.

Phases of Schizophrenia

• Prodromal Phase: Withdrawal, alone time, similar to depression/anxiety.
• Active Phase: Severe symptoms like delusions, hallucinations.
• Residual Phase: Cognitive symptoms, withdrawal.

Diagnosis Criteria

• Need at least two symptoms: delusions, hallucinations, disorganized speech, disorganized behavior/catatonic behavior, or negative symptoms.
• At least one must be delusions, hallucinations, or disorganized speech.
• Symptoms must persist for at least 6 months, with one month of active-phase symptoms.
• Symptoms should not result from another condition (e.g., substance abuse).

Causes of Schizophrenia

• Exact cause unknown; unique to humans.
• Dopamine Hypothesis:
  • Antipsychotics block dopamine receptor D2, suggesting dopamine involvement.
  • Clozapine’s effectiveness suggests involvement of other neurotransmitters like norepinephrine, serotonin, GABA.
• Genetic Factors:
  • Twin studies support a genetic basis, no specific genes identified.
• Environmental Factors:
  • Early/prenatal exposure to infection.
  • Autoimmune disorders like celiac disease.
  • Slightly more prevalent in men; onset in mid-20s for men, late-20s for women, possibly linked to estrogen regulation.

Treatment Approaches

• Antipsychotic Medications:
  • Reduce symptoms but come with cost, side effects like tolerance, dependence, withdrawal.
• Importance of a multidisciplinary approach:
  • Involves therapy, counseling, medicine, and psychopharmacology.