{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chapter 18 Biopsychology of psychiatric disorders

Chapter 18 Biopsychology of psychiatric disorders - 1...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 18 Biopsychology of psychiatric disorders Also called psychological disorders Disorders of psychological function sufficiently severe to require treatment by a psychiatrist or clinical psychologist Neuropsychological disorders are a product of dysfunctional brains, so are psychiatric disorders Historical views: o Neuropsychological disorders are products of dysfunctional brains o Psychiatric disorders are dysfunctional minds Compared to neurophysiological disorders, psychiatric disorders o Are more influenced by experiential factors o Tend to be the product of more subtle forms of brain pathology o Tend to be less well understood 18.1 Schizophrenia Splitting of psychic functions o Affects 1% of the population What is schizophrenia? A diverse disorder – multiple types exist with varied profiles (e.g.catatonic) Only two needed for one month for diagnosis Common symptoms o Delusions: delusions of being controlled (eg. “Martians are making me think evil thoughts”), delusions of persecution (“My mother is trying to poison me”), delusions of grandeur (“Michael Jordan admires my sneakers” o Inappropriate affect : failure to react with an appropriate level of emotionality to positive or negative events o Hallucinations: imaginary voices telling the person what to do or commenting negatively on the person’s behaviour o Incoherent thought : illogical thinking, peculiar associations among ideas or belief in supernatural forces o Odd behaviour : long periods with no movement, a lack of personal hygiene, talking in rhymes, avoiding social interaction, echolalia Causal factors in schizophrenia Clear genetic basis – inherit an increased risk for the disorder Multiple causes o Several different chromosomes implicated o Early experiential factors – birth complications, early infections, autoimmune Appears that interference with the normal development of susceptible individuals may lead to development of the disorder 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Discovery of the first antischizophrenic drugs Much of our understanding of schizophrenia is a consequence of the drugs that are able to treat it Chlorpromazine – calms many agitated schizoprenics & activates many emotionally blunt schizophrenics Reserpine – also found to be effective to be effective, no longer use because it produces dangerous decline in blood pressure Both drugs are only effective after 2-3 weeks & Parkinson-like motor effects are seen Dopamine Theory of Schizophrenia Antipsychotic drug effects suggest role for dopamine – drugs work by decreasing dopamine levels; schizophrenia associated with dopamine over activity o Reserpine depletes brain dopamine & other monoamines by breaking down the synaptic vesicles o
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 7

Chapter 18 Biopsychology of psychiatric disorders - 1...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online