Intro to Non-Affective Psychotic Disorders

Non-Affective Psychotic Disorders

Introduction to Non-Affective Psychotic Disorders

• Non-affective psychotic disorders are categorized within the DSM-5, particularly under the section titled "Schizophrenia Spectrum and Other Psychotic Disorders."

Characteristics of Schizophrenia Spectrum and Other Psychotic Disorders

• All disorders in this section manifest psychotic symptoms.

• Key differences among these disorders relate to four main factors:

  • The number of symptoms presented.

  • The severity of symptoms, which varies significantly among disorders.

  • The course of illness, including the pattern and duration of symptoms.

  • The presumed cause of symptoms, suggesting differing etiological factors related to each disorder.

List of DSM-5 Schizophrenia Spectrum and Other Psychotic Disorders

• The disorders under this classification include:

  • Schizoaffective Disorder

  • Other Unspecified or Specified Schizophrenia Spectrum and Other Psychotic Disorder

  • Brief Psychotic Disorder

  • Delusional Disorder

  • Catatonia

  • Schizotypal Personality Disorder

  • Schizophreniform Disorder

  • Schizophrenia

  • Substance Induced Psychotic Disorder

Other Unspecified Schizophrenia Spectrum and Other Psychotic Disorders

• This diagnosis is given when psychotic symptoms are present, causing significant distress or impairment in various functional areas such as social or occupational settings.

• Important details regarding this diagnosis:

  • Symptoms do not meet the complete criterion for any specific disorder in the schizophrenia spectrum.

  • The clinician does not specify the reason for not meeting the criteria due to insufficient information which may cover:

  • The course of symptoms

  • Determining if symptoms surpass or remain below the threshold for full psychosis

Other Specified Schizophrenia Spectrum and Other Psychotic Disorder

• Similar to the previous category, this disorder involves psychotic symptoms causing significant distress or impairment.

• It has specific examples that may be delineated:

  1. Persistent auditory hallucinations where no other features exist, associated with the Hearing Voices Network.

  2. Delusions with co-occurring mood episodes: involves persistent delusions coinciding with mood disturbances that last a significant duration relative to the delusional disturbance.

  3. Attenuated psychosis syndrome: characterized by less severe, transient psychotic-like symptoms with maintained insight, below the threshold for full psychosis.

  4. Delusional symptoms in partners of individuals with delusional disorder: where one partner may adopt delusional beliefs stemming from the other dominant partner (known as Folie à deux or "madness of two").

Folie à Deux

• Folie à Deux is also referred to as Shared Psychotic Disorder or Delusional Disorder by Proxy.

• Characteristics of this disorder:

  • It is a rare phenomenon.

  • The inducer (primary) has a psychotic disorder with delusions that significantly influences another non-psychotic individual (induced or secondary) based on shared delusions.

  • Most often observed in dyads but can occasionally encompass larger groups, such as family (termed Folie à Famille).

Risk Factors for Folie à Deux

• The exact etiology remains unclear, but certain risk factors have been identified:

  • Length of the relationship: More prevalent in long-standing relationships where strong attachment exists.

  • Nature of the relationship: Predominantly reported among family members, particularly in married or common-law partnerships and among sisters.

  • Social isolation: Pairs often share social isolation, with shared delusion serving as a mechanism to sustain their relationship.

  • Personality disorders: Secondary individuals often present symptoms of a personality disorder.

  • Untreated mental disorders: The primary typically has a diagnosis of Delusional Disorder, with schizophrenia and psychotic affective disorders also frequently observed.

  • Cognitive impairment: Secondary individuals may possess below-average IQs.

  • Life events: Stressful life events, which may exacerbate existing conditions.

  • Sex: The disorder shows a higher prevalence among females in both primary and secondary roles.

Brief Psychotic Disorder

• Defined by the presence of one or more of the following symptoms, with at least one being either (1), (2), or (3):

  1. Delusions

  2. Hallucinations

  3. Disorganized speech (characterized by frequent derailment or incoherence)

  4. Grossly disorganized or catatonic behavior

• Cultural considerations: Symptoms that are culturally sanctioned (like “cultural paranoia”) are not included because they are viewed as adaptive responses to perceived societal prejudice.

• The duration of these episodes is at least 1 day but less than 1 month, with a complete return to premorbid functioning after the episode.

• The disturbance must not be better accounted for by major depressive or bipolar disorder with psychotic features or any other psychotic disorder such as schizophrenia or catatonia, nor should it be attributable to substance effects or another medical condition.

Delusional Disorder - Diagnostic Criteria

• This disorder requires the presence of one or more delusions persisting for a duration of 1 month or longer.

• It is essential to rule out schizophrenia.

• Criteria for diagnosis include:

  • Functioning is largely unimpaired, with no behavior that is markedly bizarre or odd aside from the delusion(s).

  • Major depressive or manic episodes, if present, should be brief relative to the delusional periods.

  • The disturbance should not be attributable to the effects of a substance or another medical condition, nor should it be better explained by other mental disorders (like body dysmorphic disorder or obsessive-compulsive disorder).

  • Hallucinations, if present, must not be prominent unless they are connected directly to the delusional theme (e.g., sensations of insects due to delusions of infestation).

Catatonia

• Catatonia can manifest within various disorders, including neurodevelopmental disorders, psychotic disorders, bipolar disorders, depressive disorders, and certain medical conditions (e.g., autoimmune disorders).

• In DSM-5, catatonia is categorized into:
  a) Catatonia associated with another mental disorder (i.e., neurodevelopmental, psychotic, bipolar, or depressive disorders)
  b) Catatonic disorder due to another medical condition
  c) Unspecified catatonia

Clinical Features of Catatonia

• Catatonia is diagnosed based on the presentation of three or more of the following symptoms:

  1. Stupor: No psychomotor activity; the individual does not actively interact with their environment.

  2. Catalepsy: Passive induction of a posture maintained against gravity.

  3. Waxy flexibility: Slight resistance to being repositioned by the examiner.

  4. Mutism: Minimal or absent verbal response (not applicable if known aphasia).

  5. Negativism: Opposition or absence of response to external stimuli or instructions.

  6. Posturing: Active maintenance of a posture against gravity.

  7. Mannerism: Odd, caricature-like exaggerated actions.

  8. Stereotypy: Non-goal-directed movements that are repetitive and unusually frequent.

  9. Agitation: Occurs without external stimuli.

  10. Grimacing: Unusual facial expressions.

  11. Echolalia: Mimicking the speech of others.

  12. Echopraxia: Imitating another's movements.