Chapter 14 - Psychosis Flashcards

1
Q

Who were early figures in diagnosing schizophrenia, and what were their contributions?

A

-Emil Kraepelin (1899): Combined symptoms like catatonia, hebephrenia, and paranoia under the term dementia praecox, distinguishing it from manic depression.
-Eugen Bleuler (1908): Coined the term schizophrenia (“split mind”) and introduced the concept of associative splitting, describing a breakdown in associative threads.

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2
Q

What are two key clusters of symptoms in schizophrenia?

A

-Hallucinations: Seeing or hearing things that others do not.
Delusions: Unrealistic, bizarre beliefs not shared by others in the same culture.

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3
Q

Why is it challenging to identify symptoms of schizophrenia?

A

-The symptoms vary greatly, and not all individuals diagnosed share the same behaviors or symptoms.

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4
Q

What characterizes psychosis in schizophrenia?

A

-Psychosis involves delusions and hallucinations, causing a loss of contact with reality and affecting daily functioning.

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5
Q

What is included in the schizophrenia spectrum of disorders?

A
  • Schizophrenia spectrum includes schizophreniform disorder, schizoaffective disorder, delusional disorder, and brief psychotic disorder.
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6
Q

How does the DSM-5-TR assess schizophrenia symptoms?

A

-Symptoms are assessed on a 0–4 scale, with 0 indicating no symptoms, and include positive, negative, and disorganized symptoms.

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7
Q

What are positive symptoms of schizophrenia?

A

-Positive symptoms include disturbing experiences like delusions and hallucinations.

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8
Q

What types of delusions are common in schizophrenia?

A

-Delusion of grandeur: Believing one has exceptional abilities or fame.
Delusion of persecution: Believing others are plotting harm.
Cotard’s syndrome: Belief that one is dead or non-existent.
Capgras syndrome: Belief that loved ones have been replaced by impostors.

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9
Q

What are hallucinations in schizophrenia?

A

-Hallucinations are sensory experiences without external input, with auditory hallucinations being the most common, often associated with abnormal activation of the left auditory cortex.

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10
Q

What are negative symptoms of schizophrenia?

A

-Negative symptoms reflect a lack or insufficiency of normal behavior, such as:

Avolition: Inability to initiate or persist in activities
Alogia: Limited speech, brief replies
Anhedonia: Lack of pleasure
Asociality: Lack of interest in social interaction
Affective flattening: Limited emotional expression`

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11
Q

What are disorganized symptoms of schizophrenia?

A

-Disorganized symptoms include erratic behaviors like:

Disorganized speech: Communication problems
Inappropriate affect: Laughing or crying at inappropriate times
Catatonic immobility: Remaining in a position someone else places them in

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12
Q

What other disorders are related to psychosis in the DSM-5-TR?

A

-Schizophreniform disorder
Schizoaffective disorder
Delusional disorder (various subtypes)
Brief psychotic disorder
Attenuated psychosis syndrome
Schizotypal personality disorder

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13
Q

What is the prevalence of schizophrenia in the general population?

A

-Schizophrenia affects 0.2% to 1.5% of the general population.

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14
Q

What are some characteristics of schizophrenia’s impact on life expectancy?

A

-People with schizophrenia typically have a lower life expectancy and may be at risk of suicide.

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15
Q

When can the symptoms of schizophrenia begin?

A
  • Symptoms can begin early, with a prodromal stage where unusual behaviors occur before serious symptoms develop.
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16
Q

How long can it take for someone at high risk of schizophrenia to show symptoms?

A
  • It can take 2–10 years for symptoms to develop in individuals at high risk.
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17
Q

Is relapse possible even after early treatment for schizophrenia?

A

-Yes, relapse is possible even after early treatment.

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18
Q

Is schizophrenia universal across cultures?

A

-Yes, schizophrenia occurs in all races and cultures, though treatment outcomes vary across different cultural settings.

19
Q

How do cultural factors impact schizophrenia treatment?

A

-Treatment outcomes are often better in poorer countries, though there are also issues with misdiagnoses due to stereotypes and bias.

20
Q

How do family studies relate to schizophrenia?

A

-Children of parents with schizophrenia are more likely to develop the disorder, indicating a genetic predisposition.

21
Q

What did the Genain quadruplet study show about schizophrenia?

A

-The Genain quadruplets, who shared the same genes and environment, all developed schizophrenia, but their onset, symptoms, and course varied.

22
Q

How do twin studies inform our understanding of schizophrenia?

A

-Identical twins (100% shared genes) have a higher concordance rate for schizophrenia than fraternal twins (50% shared genes), indicating a genetic component.

23
Q

What do adoption studies reveal about schizophrenia?

A

-Adoption studies show that a good environment can reduce the risk of schizophrenia, even in genetically predisposed individuals.

24
Q

How do gene-environment interactions play a role in schizophrenia?

A

-Genetic vulnerability interacts with specific environmental factors, particularly during critical developmental stages, leading to the development of schizophrenia.

25
Q

What are linkage and association studies in the context of schizophrenia?

A

-These studies suggest that multiple common genes contribute to schizophrenia risk, each having a small effect that can be detected by genome-wide association studies.

26
Q

What is a potential genetic marker for schizophrenia?

A

-An eye-tracking deficit may be a marker for schizophrenia.

27
Q

How do multiple genes contribute to schizophrenia?

A

-Schizophrenia involves multiple genes located at different sites throughout chromosomes, referred to as quantitative trait loci, which may account for varying severity levels.

28
Q

How does dopamine relate to schizophrenia?

A

-Dopamine plays a key role in schizophrenia, with neuroleptics (dopamine antagonists) being effective in treatment, but also producing negative side effects. Dopamine agonists like L-dopa and amphetamines can worsen symptoms.

29
Q

What brain structural changes are associated with schizophrenia?

A

-People with schizophrenia often have abnormally large lateral and third ventricles, and hypofrontality (less active frontal lobe), which is associated with negative symptoms.

30
Q

How do viral infections contribute to schizophrenia?

A

-Prenatal exposure to viruses like influenza or parasites like Toxoplasma gondii may increase the risk of schizophrenia, along with other prenatal brain damage indicators such as finger ridge patterns.

31
Q

What role does stress play in the development of schizophrenia?

A

-Stress, examined through sociogenic and social selection hypotheses, can influence the development and progression of schizophrenia. People with schizophrenia may also drift into lower social classes due to their condition.

32
Q

How can family dynamics affect schizophrenia?

A

-Family factors such as “schizophrenogenic” mothers, double bind communication, and high levels of expressed emotion (EE) can contribute to the onset and relapse of schizophrenia.

33
Q

What is expressed emotion (EE) and how does it impact schizophrenia?

A
  • EE refers to high levels of criticism, disapproval, and animosity in family interactions, and is a predictor of relapse in schizophrenia across cultures.
34
Q

What are neuroleptics, and how do they work in treating schizophrenia?

A

-Neuroleptics are dopamine antagonists that help people think more clearly and reduce or eliminate delusions and hallucinations.

35
Q

What percentage of people respond to neuroleptics?

A

-Neuroleptics are effective for 60%–70% of people who try them.

36
Q

ow do newer antipsychotics compare to traditional neuroleptics?

A

-Newer antipsychotics have fewer side effects, reduce both positive and negative symptoms, and improve cognitive functioning.

37
Q

What is transcranial magnetic stimulation (TMS), and how is it used in schizophrenia treatment?

A

-TMS is used to treat auditory hallucinations, though the effect is brief.

38
Q

Is the psychoanalytic approach effective for schizophrenia?

A

-No, the psychoanalytic approach is not beneficial and may even be harmful.

39
Q

What is behavioural family therapy, and how does it help schizophrenia patients?

A

-Behavioural family therapy involves working with families to improve interactions and includes ongoing support to maintain benefits.

40
Q

What is a token economy, and how is it used in schizophrenia treatment?

A

-A token economy rewards patients for achieving independence in daily skills, promoting better functioning.

41
Q

What role does CBT play in treating schizophrenia?

A
  • CBT is used to address symptoms of delusions and depression.
42
Q

What is the importance of early intervention in schizophrenia treatment?

A

-Early intervention can help manage symptoms before they worsen, improving long-term outcomes

43
Q

How do schizophrenia treatments vary across cultures?

A

-Treatments include herbal medicines, acupuncture, oral treatments, imprisonment, and ancestor worship, depending on cultural practices.

44
Q

How can schizophrenia be prevented in at-risk individuals?

A

-Prevention involves identifying and treating children at risk, addressing instability in the early family environment, and treating individuals in the prodromal stages of the disorder.