week 5 Flashcards
psychosis
If you are unable to tell the difference between what is real and what is unreal.
schizophrenia spectrum
DSM-5 refers to the fact that there are five domains of symptoms that define psychotic disorders, and their number, severity and duration distinguish psychotic disorder from each other.
positive symptoms
delusions, hallucinations, disorganized speech and disorganized or abnormal motor behaviour. Are overt expressions of unusual perceptions, thoughts and behaviours
negative symptoms
may be restricted emotional expression or affect and sufferers often show numerous cognitive deficits.
delusions
are ideas that an individual believers are true but that are highly unlikely and often simply impossible. These people look for evidence in support of their beliefs
persecutory delusions
which make people believe that they are being watched or tormented by people they know or by agencies or persons in authority with whom they have never had direct contact, such as the FBI.
delusions of reference
in which people believe that one is a special being possesses special powers
delusions of thought insertion
are beliefs that one’s thoughts are being controlled by outside forces.
hallucinations
unreal perceptual experiences of people with schizophrenia are frequent, persistent, complex, sometimes bizarre and often entwined with delusions
auditory hallucinations
are the most common. They may consist of a voice speaking the individual’s thoughts aloud or carrying on a running commentary on the person’s behaviour
visual hallucinations
may be accompanied by auditory hallucinations and be consistent with the delusions
tactile hallucinations
involve the perception that something is happening to the outside of the person’s body, example bugs crawling on the body
somatic hallucinations
involve the perception that something is happening inside the person’s body, for example, that worms are eating their intestines
formal thought disorder
disorganized thinking of people with schizophrenia. One of the most common forms is a tendency to slip from one topic to a seemingly unrelated topic with little coherent transition.
catatonia
disorganized behaviour that reflects unresponsiveness to the environment. From a lack of response to instructions to showing a rigid, inappropriate, bizarre posture to a lack of verbal or motor responses
negative symptoms
involve the loss of certain qualities of the person. The core negative symptoms in schizophrenia are restricted affect and avolition/asociality
restricted affect
refers to a severe reduction in or absence of emotional expression. People with schizophrenia show fewer facial expressions of emotion, may avoid eye contact and are less likely to use gestures to communicate emotional information that people without the disorder. Their tone of voice may be flat
anhedonia
inability to experience pleasure
avolition
inability to initiate or persist at common, goal-directed activities including those at work, at school and at work
DSM-5 criteria
an individual must show two or more symptoms of psychosis, at least one of which should be delusions, hallucinations or disorganized speech. These symptoms must be consistently and acutely present for at least 1 month. must have symptoms of the disorder for at least 6 months to a degree that impairs social and occupational functioning.
prodromal symptoms (schizophrenia)
before the acute phase
residual symptoms (schizophrenia)
after the acute phase
sociocultural factors schizophrenia
tends to have a more benign course in developing countries than in developed countries. The social environment in developing countries may facilitate adaption and recovery better than the social environment in developed countries.
gender and age factors schizophrenia
women with schizophrenia tend to have a better prognosis than men with the disorder and are hospitalized less often and for briefer periods of time.
schizoaffective disorder
is a mix of schizophrenia and a mood disorder. Psychotic symptoms and prominent mood symptoms meeting the criteria from a major depressive or manic episode are experienced simultaneously
schizophreniform disorder
requires that most of the criteria of schizophrenia are met but the symptoms only last 1 to 6 months. Will eventually receive a diagnosis of schizophrenia or schizoaffective disorder.
brief psychotic disorder
show a sudden onset of delusions, hallucinations, disorganized speech and/or disorganized behaviour
delusional disorder
have delusions lasting at least 1 month regarding situations that occur in real life but do not show any other psychotic symptoms. They do not act oddly or have difficulty functioning
schizotypal personality disorder
have a life long pattern of significant oddities in their self-concept, their ways of relating to others and their thinking and behaviour. The disorder may eventually develop into the full syndrome of schizophrenia.
biological theories schizophrenia
- evidence indicates genetic transmission, although genetics does not fully explain who develops this disorder.
- some people with schizophrenia show structural and functional abnormalities in specific areas of the brain, which may contribute to the disorder
- many people with schizophrenia have a history of birth complications or prenatal exposures to viruses which may affect brain development
- neurotransmitter theories hold that excess levels of dopamine contribute to schizophrenia; newer research also focuses on the neurotransmitter’s serotonin, GABA and glutamate
family studies schizophrenia
the genetic similarity to a person with schizophrenia decreases and individuals’s risk of developing schizophrenia als decreases.
adoption studies schizophrenia
it was found that the biological relatives of adoptees with schizophrenia were 10 times more likely to have a diagnosis of schizophrenia than were the biological relatives of adoptees who did not have schizophrenia.
twin studies schizophrenia
even when a person carries a genetic risk for schizophrenia, however many other biological and environmental factors may influence whether and how he or she manifests the disorder. Epigenetic differences, dopamine systems, are thought to play a big factor in the development of the disorder.
brith complications (schizophrenia)
serious prenatal and birth difficulties are more frequent in the histories of people with schizophrenia than in those of people without and may play a role in the development of neurological difficulties
prenatal viral exposure (schizophrenia)
epidemiological studies have shown high rates of schizophrenia among persons whose mothers were exposed to viral infections while pregnant.
phenothiazines and neuroleptics
drugs that tend to reduce the symptoms of schizophrenia. They block the reuptake of dopamine in the brain, reducing the functional level in the brain.
amphetamines (schizophrenia)
increase the functional level of dopamine in the brain tend to increase the incidence of the positive symptoms of schizophrenia.