Schizophrenia Flashcards

1
Q

How does the DSM - V define hallucinations?

A
  • perception-like experiences occurring in the absence of an external stimulus
  • occurring in absence of hypnogogia and hypnopompic experiences
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2
Q

What percentage of patients with schizophrenia report experiencing hallucinations?

A

75%

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3
Q

What hallucinations have the highest percentage experienced?

A
  • 60- 70% experience auditorry hallucinations
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4
Q

What are the typically experienced auditory hallucinations?

A
  • running commentary
  • criticizing and condemning (persecutory hallucinations)
  • command hallucinations (33-74% experience instructions to harm themselves)
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5
Q

What are risk factors for hostility in schizophrenia?

A
  • substance abuse
  • non compliance with medications
  • younger males with hx of violence
  • hx of aggression/violence
    Significant part is that because of the delusions cannot be predicted when and where they’ll occur
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6
Q

What is a delusion?

A
  • falsely held belief despite what others believe and despite evidence to the contrary
  • beliefs not culturally accepted
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7
Q

How are delusions usually categorised?

A
  • by their content and bizareness

e. g. thought withdrawal, delusion of control, thought insertion, thought broadcasting

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8
Q

What is paranoid/persecutory delusions?

A
  • beliefs others are acting to harm of plot against them

- patient heightened state of threat and hypervigilant to perceived threat

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9
Q

What is a delusion of reference?

A
  • patients believe that personal messages are being conveyed via neutral sources (e.g. coded messages via tv news)
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10
Q

What is a grandiose delusion?

A
  • belief one has special powers, abilities, influence, achievements or another identity that typically relates to power, wealth or fame
  • also common in manic episodes
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11
Q

What is a nihilistic delusion?

A
  • belief that one is dead or parts of body no longer exist
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12
Q

What is a somatic delusion?

A
  • false belief that one’s organs are (diseased); infested with insects (parasitosis); anatomy is disfigures (dysmorphobia)
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13
Q

What is the passivity phenomena?

A
  • belief that patient is under the control of another person’s force
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14
Q

What are delusions of guilt?

A
  • cause of significant events (e.g 9/11; aids)
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15
Q

What are jealousy delusions?

A
  • belief that one’s partner has been unfaithful (e.g. evidence via coded messages)
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16
Q

What is an erotomanic delusion?

A
  • false belief that patient’s romantic feelings are reciprocated (often by a famous other)
17
Q

What is a misidentification delusion?

A
  • belief that someone they know has had their identity tolen
18
Q

What is thought disorder?

A
  • disturbance in flow and or form of speech
  • illogical or disjointed speech
  • structure of thoughts (form of speech: incoherent, nonsensical)
19
Q

How are symptoms categorised in thought disorder

A

negative: reduced manifestations of thoughts & poverty of speech
positive: circumlocution (goes round and round point); nondirective & verbose (all over the place) derailment (comments slipping from one to next e.g. i payed tennis, going to the court, judge etc); tangential (talking around the point); echolalia; word salad; neologisms (idiosyncratic use of words)

20
Q

what is disorganised behaviour in schizophrenia?

A
  • grossly disorganised and abnormal motor behaviour
21
Q

What are some egs of catatonic behaviour?

A
  • extreme negativism (refuses to do what you say)
  • immobility (‘waxy flexibility’- move arm and will stay there)
  • catatonic excitement: excessive purposeless activity
  • peculiar voluntary movements (posture, grimacing)
  • echolalia, echopraxia, mutism
22
Q

What are the subtypes of Schizophrenia?

A
  • schizotypal (pd)–> argued to be precursor
  • delusional (erotomania, persecutory, grandiose, jealous)
  • brief psychotic disorder (sudden, <1m, return to fning)
  • schizophreniform (1-6 m, lack of impaired fning)
  • schizoaffective
  • substance- induced psychotic
  • psychosis due to a medical condition
  • catatonia & other unspecified
23
Q

What is criterion A for Schizophrenia in DSM-V?

A

A: 2 or more of following for sig portion of time during 1 m period (or less if treat successfully), must have 1,2 or 3:

  • hallucinations
  • delusions
  • disorganised speech
  • grossly disorganised or catatonic behaviour
  • negative symptoms
24
Q

What are criterion b, c and d-f of schizophrenia in dsm-v?

A

B: Significant impact to fn (below baseline)
C: continuous signs present for atleast 6 m (gradual deterioration in fn, must be at least 1 m of psychotic symptoms)
D-F: not better accounted for by dx, substance.medical condition or PDD.

25
Q

What are the different subtypes of schizphrenia?

A
  • catatonic
  • disorganised
  • paranoid
  • undifferentiated
  • residual
26
Q

What is disorganised type characterised by?

A
  • dis speech
  • dis
    behaviour
  • flat/inappropriate
  • delusions & hallucinations NOT TYPICALLY PRESENT
  • criteria for catatonic not met
  • difficult to treat & poor prognosis
27
Q

What is undifferentiated type?

A
  • diagnosis of schizophrenia met but not criteria for other 3 subtypes
28
Q

What is residual type?

A
  • 1 ep of schizophrenia in past
  • absence of prominent +ve symptoms
  • presence of -ve symptoms, attenuated +ve symptoms (i.e. unusual beliefs/eccentric behaviour)
29
Q

What is the prevalence and gender ratio?

A
  • 1-2% lifetime prevalence

- higher for males- f:m (2:3)

30
Q

What does recent data suggest about the prevalence across cultures and countries?

A
  • considerable variation across countries
  • increased prevalence in developed nations
  • two fold greater risk for those born in urban compared to rural settings
31
Q

What is the typical age of onset of schizophrenia?

A
  • typically onset occur late as