Schzio - Diagnosis

Schzio - Diagnosis

1. originally called demetia praecox (premature mental deterioration)

2. not related to dissociative identity disorder (multiple personality disorder)

   • schizo is split between emotional and intellectual aspects of experience

3. diagnosing is difficult no lab tests - based on behavioural observation

4. DSM-IV to be diagnosed - deterioration least 6 months and 2 of:

   • delusions
     • unjustifiable beliefs
     • positive
   • hallucinations
     • false sensory experiences like hearing voices
     • positive
   • disorganised speech
     • positive
       • behaviours are present that should be absent
   • grossly disorganised behaviour
     • positive
   • weak or absent signs of emotion, speech and socialisation
     • negative
       • behaviours are absent that should be present
   • all judgement calls

5. cognitive symptoms

   • limitations of thought and reasoning
     • difficulty understanding and using abstract concepts related to attention and working memory
       • HANLON ET AL 2005
   • IQ few points below average population

6. Demographic data

   • 1% worldwide suffer from schizo at some point
     • NARROW ET AL 2002
   • mid 1900's reported prevalence of schizo declining in many countries
   • all ethnic groups all over the world
     • ore common in cities than rural areas
       • KELLY ET AL 2010
   • diet high in sugar and saturated fat affravates schizophrenia but fish alleviates it
     • omega 3 fatty acids increase production of BDNF increasing production of new cells in hippo and block apoptosis and other neural damage
     • PEET 2004