Schizophrenia Flashcards
Common characteristics of schizophrenia
Auditory hallucinations, paranoid delusions and disorganised speech or thinking
Positive Symptoms of schizophrenia
Hallucinations, delusions, thought disorder
Negative symptoms of schizophrenia
Blunted affect, poverty of speech, inability of experience pleasure (ahedonia) and lack of motivation (avolution)
ID10 has subtypes of schizophrenia including
Paranoid schizophrenia (delusions and hallucinations), catatonic schizophrenia (psychomotor disturbances)
DSM-5 (2013) criteria of schizophrenia
A= 2+ symptoms persistent in a month B= social and occupational dysfunction C= duration at least 6 months
Dimensional assessment assessed on:
O-4 scale of mania, cognition and depression
Epidemiology of schizophrenia (Van Oz & Kapur, 2009)
Equal in men and women, 1% general population
Genetic aetiology of schizophrenia
MZ twins 65%, Both parents 46%
Prenatal aetiology of schizophrenia
Early neurodevelopment e.g malnutrition or stressful mother during foetal development (Van Oz and Kapur, 2009)
Social aetiology of schizophrenia
Living in urban environment, social disadvantage, childhood abuse and trauma
Drugs aetiology of schizophrenia
Cannabis and paranoia (Freeman et al, 2014): THC in 121 invulnerable ptps
Functional brain differences in schizophrenia patients
FMRI and PET reveal differences in frontal lobes, hippocampus and temporal lobes
Medical model of schizophrenia
Illness with biological cause, symptoms only signal presence of a disorder
Psychological model of schizophrenia
Focus of phenomenology and symptoms a psych process.
Focuses on a range of biases (attribution and reasoning biases)
Continuum model of schizophrenia
Symptoms can be seen in non clinical population (Van Oz et al., 2009): hallucinations and delusions on a continuum