Schizophrenia mindmap

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  • Schizophrenia
    • Biological explanations
      • structural abnormalities
        • enlarged ventricles
          • they're cavities that form and produce and transport cerebrospinal fluid
            • some schizophrenic individuals have deeper ventricles
              • this has been shown through CAT scans and MRI scans
        • cortical atrophy
          • this is the loss of nerons in the cerebral cortex
          • this affects cognitive functions
      • dopamine hypothesis
        • simple - too much dopamine (neurotransmitter) leads to schizophrenic symptoms
        • Griffiths induced psychosis in non-schizophrenic volunteers
          • they showed an onset of schizophrenic symptoms. they became cold and distant as they were experiencing delusions
          • the participants were administered dextro-amphetamine
          • all the symptoms were negative, so doesn't prove the causes of positive symptoms
        • dopamine receptors and could in the cerebral cortex and limbic system
          • Seaman and Lee showed the impact of antipsychotics had on the D2 receptors
        • the limbic system has subcortical structures responsible for emotion and memory formation
        • mesocortical pathway
          • sends signals FROM the ventral tegumental area TO the frontal cortex
            • this is key in emotional responses
          • Davies  said lower dopamine in the D1 receptor presented negative symptoms
        • mesolimbic pathway
          • signals from the ventral tegmental area TO the nucleas accumbens
            • too much dopamine results positive symptoms
    • Individual differences
      • psychodyna-mic approach
      • The  cognitive approach
    • Social factors
      • dysfunctional families
      • sociocultural factors
    • Treatments
      • Drug therapy
      • CBT
    • characteristics
      • positive symptoms
        • delusions
          • they are beliefs that aren't real
            • a delusion or persecution would be that they truly believed someone is after them, usually with the intent to hurt them
        • hallucinations
          • they're perceptions that aren't real
            • the most commonly known hallucination is hearing voices
        • echopraxia
          • they will begin to mimic someone else's movements and actions
      • negative synptomn
        • alogeia
          • the loss of speech
            • this can be completely, or just with certain words
        • anhedonia
          • they act inappropriately to certain situations
        • catatonic behaviour
          • frantic and rapid movements may occur. the person seems overly active. they usually make odd facial expressions snd impromptu noises
        • avolition
          • they show no interest in their usual activities
        • flatness of affect
          • this is when they show no emotion at all. they'll take as they usually do, but with no physical or mental emotion
      • Disordered thinking
        • their train of thought may seem to get lost very often, and will talk about something else
        • their speech is usually fast and jumbles, getting things muddled up
  • characteristics
    • positive symptoms
      • delusions
        • they are beliefs that aren't real
          • a delusion or persecution would be that they truly believed someone is after them, usually with the intent to hurt them
      • hallucinations
        • they're perceptions that aren't real
          • the most commonly known hallucination is hearing voices
      • echopraxia
        • they will begin to mimic someone else's movements and actions
    • negative synptomn
      • alogeia
        • the loss of speech
          • this can be completely, or just with certain words
      • anhedonia
        • they act inappropriately to certain situations
      • catatonic behaviour
        • frantic and rapid movements may occur. the person seems overly active. they usually make odd facial expressions snd impromptu noises
      • avolition
        • they show no interest in their usual activities
      • flatness of affect
        • this is when they show no emotion at all. they'll take as they usually do, but with no physical or mental emotion
    • Disordered thinking
      • their train of thought may seem to get lost very often, and will talk about something else
      • their speech is usually fast and jumbles, getting things muddled up

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