Psychiatric Disorders and Delusional Disorders Study Notes

Secret Admiration: Refers to an individual having hidden feelings of love towards someone.
Nihilistic Delusion:
- Definition: A belief that a major catastrophe is imminent or that something significant does not exist anymore.
Malicious Delusions:
- Definition: Preoccupation with false beliefs related to bodily functions or organ performance.

Bizarre Delusions:
- Characteristics: Clearly implausible, not comprehensible to individuals within the same culture, and not based on ordinary life experiences.
- Example: Believing that someone has removed one's organs and replaced them without leaving any scars, which is literally impossible.
Non-Bizarre Delusions:
- Definition: False beliefs that, while incorrect, could still be plausible in real life.
- Example: Believing that police are monitoring or harassing you despite having no evidence.

Definition: Vivid, involuntary perceptions that occur without external stimuli, excluding experiences during sleep transitions or religious cultural contexts.
Examples:
- Hearing voices in one's head.
- Seeing people who are not present.

Definition: Characterized by rapid shifts between topics, demonstrating derailment and loose associations.
Example: Speech that resembles "word salad," an unstructured and incoherent mode of speech that may severely disorganize communication.

Definition: Behavior that ranges from childlike silliness to unpredictable agitation impeding daily tasks and general functioning.
Catatonia: A severe reduction in responsiveness to the environment, which can include:
- Resistance to instructions.
- Holding rigid or strange postures.
- Waxy flexibility (maintaining a position even when moved).
- Mutism or inability to speak.
Related to schizophrenia as well as mood and medical disorders.

Definition: Characterized by diminished emotional expression and lack of motivation.
Symptoms:
- Alogia: Not speaking much.
- Anhedonia: Reduced ability to experience pleasure.
- Asociality: Lack of interest in social interactions.

Diagnostic Criteria:
- Presence of one or more delusions that persist for at least one month. The diagnostic criterion A for schizophrenia must never be met.
Delusions Types:
- Grandiose, jealous, persecutory, somatic, and unspecified types.
Functional Impact:
- Behaviors are not merely bizarre or odd; functioning may be impaired, which can include occupational difficulties and social isolation.
Associated Features:
- Possible issues in relationships or work, irritability, mood disturbances, and suspicious behavior.
Prevalence: Lifetime prevalence is around 0.2%.
Associated Risk Factors:
- Significant familial frequency with schizophrenia and schizotypal personality disorder.

Diagnostic Criteria:
- Includes one or more of the following: delusions, hallucinations, disorganized speech, or grossly disorganized or catatonic behavior.
- Duration must be at least 1 day but less than 1 month, with a requirement for full remission of symptoms.
Associated Features:
- Emotional turmoil, confusion, increased suicidal risk, and cognitive impairments.
Prevalence/Onset:
- 2% to 7% of first-onset psychosis cases with an average age onset usually in mid-thirties, may appear in adolescence and early adulthood.

Diagnostic Criteria:
- Must have two or more of delusions, hallucinations, disorganized speech, or negative symptoms.
- Duration must be at least 1 month but less than 6 months.
Characteristics:
- Functional impairment and no specific laboratory tests for diagnosis are defined.
Prevalence/Onset:
- Low incidence rate, with significant genetic and cultural risk correlating with schizophrenia.

Definition:
- A chronic disorder that impacts cognition, behavior, and emotions.
Symptoms:
- Classic recipe includes delusions, hallucinations, disorganized speech, catatonia, and negative symptoms for at least 6 months.
Functional Impacts:
- Significant impairment in occupational, academic, and personal care aspects of daily living.
Common Symptoms:
- Inappropriate emotional responses (e.g., laughing at unsuitable times), sleep disturbances, decreased appetite, and disassociation symptoms.
Epidemiology:
- Prevalence ranges from 0.3% to 0.7%, usually begins in early 20s for men and late 20s for women.

Suicide Risk:
- Approximately 5-6% die by suicide, significantly associated with depression.
Cognitive Impairments:
- Impact on memory, language, and executive functioning.
Comorbid Conditions:
- Schizotypal or paranoid personality disorders often precede schizophrenia.

Broad scope encompassing:
- All polynomial disorders, schizoaffective disorder, mood disorders with psychotic features, and more.

Definition:
- Combines symptoms of schizophrenia with major mood disorder episodes (depression or bipolar mania).
Symptoms:
- Includes major mood episodes coupled with psychotic signs, yet typically less severe than schizophrenia.
Comorbidity:
- Often co-occurs with substance use disorders.

Definition:
- Induced psychosis due to substance usage, potentially varying in duration.
Epidemiology:
- One-third of individuals diagnosed later meet criteria for schizophrenia or bipolar disorder.
Implications:
- Importance of sobriety in treatment and neuroplasticity to aid the brain’s recovery.

Definition:
- Psychosis instigated by a medical condition, evidenced through medical history, examinations, and lab findings.

Definition:
- Catatonia manifests with at least three symptoms such as stupor, catalepsy, waxy flexibility, mutism, and posturing.
Impact:
- Highlights the psychological experience of catatonia, retaining awareness while being physically unresponsive.
Associated Conditions:
- Catatonia can also arise due to other mental disorders and certain medical conditions.