Schizophrenia Flashcards
How is Schizophrenia understood in the DSM-5?
- it is understood to exist on a spectrum from less severe to extremely severe (schizoaffective viewed as the most severe, with schizophrenia being right behind it)
What were the early descriptions of schizophrenia?
- Concept formulated by Emil Kraepelin and Eugen Bleuler
- Kraepelin first presented his notion of dementia praecox (whereas Bleuler used the term ‘schizophrenia’).
- Kraepelin differentiated two groups of endogenous psychoses
1) Manic-depressive illness
2) Dementia praecox - Subtypes: Dementia paranoides, catatonia, and hebephrenia
- Kraepelin believed that they shared a common core: an early onset (praecox) and a deteriorating course marked by a progressive intellectual deterioration (dementia)
What were the three subtypes of schizophrenia included in the DSM-IV-TR?
- Heterogeneity of schizophrenic symptoms suggested the presence of subtypes of the disorder.
- Three types of schizophrenic disorders that were included in DSMIV-TR:
- Disorganized (hebephrenic; trouble speaking and thinking coherently. Might use similar-sounding words and have flat or shifting affect. Changing from laughing to crying. Behaviour is disorganized and not goal-directed)
- Catatonic (is also a negative symptom; immobility, frozen state or can be really hyperactive and excited. They engage in echolalia- repeating back the speech of others. Rare bc of medication development)
- Paranoid (characterized by a lot of delusions- ideas that don’t match up with reality. Could be police following you, aliens abductions etc.)
- Were originally proposed by Kraepelin many years ago
What changes were made to schizophrenia from the DSM-IV-TR to the DSM-IV?
- DSM-5 discontinued all of the “classic” subtypes of schizophrenia and rejected alternatives to take their place.
- DSM-5 includes a dimensional rating of symptoms that enables clinicians to consider the heterogeneity in symptom expression
- Most severe to least severe: Schizoaffective, Schizophrenia, Schizophreniform, Brief psychotic and delusional
What are the positive symptoms of schizophrenia?
- Positive features: appear to reflect an excess or distortion of normal functions.
- Including distortions in thought content (delusions), perception (hallucinations), language and thought processes (disorganized speech), and self-monitoring of behaviour (grossly disorganized or catatonic behaviour).
- Two dimensions of positive symptoms
- “psychotic dimension” includes delusions and hallucinations
- -“disorganized dimension” includes disorganized speech and behaviour
What are the negative symptoms of schizophrenia?
Negative symptoms – appear to reflect a diminution or loss of normal functions.
- Flat affect – Diminished emotional expression
- Avolition – lack of energy
- Alogia – Poverty of speech, amount of speech, poverty of content of speech etc.
- Anhedonia – Lack of interest in recreational activities, relationships with others, and sex.
- Asociality – Few friends, poor social skills, and little interest in being with others.
What are the key features of schizophrenia?
- positive symptoms
- negative symptoms
- Delusions
- Hallucinations
- Grossly disorganized or abnormal motor behaviour
- Disorganized thinking
- Catatonia
What are delusions?
Delusions are erroneous beliefs that usually involve a misrepresentation of perceptions or experience, and are resistant to change even in the face of conflicting evidence. Content may include a variety of themes:
- Persecutory delusions are the most common – the person believes they are being tormented, followed, tricked, spied on, or ridiculed.
- Referential delusions – believes that certain gestures,
comments, passages from books/newspapers, song lyrics (etc.) are directed at them.
What are the different types of delusions?
- Grandiose delusions – believes they have exceptional abilities, wealth, or fame
- Erotomanic delusions – believes that another person is in love with him/her
- Nihilistic delusions – believes that a major catastrophe will occur
- Somatic delusions – believes that health or organ function is at risk
What are bizarre vs. non-bizarre delusions?
- Delusions can be bizarre if they are clearly implausible, do not derive from ordinary experience, and are not understandable to peers.
- Bizarre – belief that an outside force has removed my internal organs and replaced them with someone else’s organs (without leaving scars).
- Nonbizarre – belief that I am being watched by the police or government.
What are hallucinations?
- Hallucinations: Perception-like experiences that occur without an external stimulus. Vivid and clear. Not under voluntary control. Can occur in any sensory modality (auditory, visual, olfactory, gustatory, tactile).
- Auditory are most common – usually experienced as voices (familiar or unfamiliar) that are perceived as distinct from the person’s own thoughts.
What is grossly disorganized or abnormal motor behaviour?
- Grossly Disorganized Behaviour – may manifest in a variety of ways, including childlike silliness to unpredictable agitation.
- May involve difficulties in performing goal-directed behaviours.
What is disorganized thinking (speech)?
Disorganized thinking (“thought disorder”) - due to difficulty in diagnosing “thought disorder” and because this is usually based on the individual’s speech, the emphasis here is on disorganized speech.
- Derailment or loose associations
- Tangentiality
- Incoherence or “word salad”
What is catatonia?
- Catatonic Motor Behaviours – include a marked decrease in reactivity to the environment
- Negativism – resistance to instructions
- Catatonic mutism and stupor – complete unawareness
- Catatonic rigidity – rigid posture
- Catatonic posturing – assuming bizarre postures
- Catatonic excitement – purposeless excessive motor activity
What is inappropriate affect?
These are emotional responses which are out of context:
- The client may laugh on hearing that his or her mother just died.
- The client may become enraged when asked a simple question about how a new garment fits.
- Rapid shifts from one emotional state to another for no discernible reason.
- This symptom is quite rare, but its appearance is of considerable diagnostic importance because it is relatively specific to schizophrenia.
What are the diagnostic criteria for schizophrenia?
A. Two or more of the following must be presen for a significant portion of time during a 1 month period. At least one of them must be 1, 2, or 3
1. Delusions
2. Hallucinations
3. Disorganized speech
4. Grossly disorganized or catatonic behaviour
5. Negative symptoms (i.e., diminished emotional expression or avolition)
B. For a significant portion of the time since the onset of the disturbance, level of functioning in one or more major areas, such as work, interpersonal relations or self care, is markedly below the level achieved prior to the onset
C. continuous signs of the disturbance persist for at least 6 months. This 6 month period must include at least 1 month of symptoms that meet criterion A. During these prodromal or residula periods, the signs of the disturbance may be manifested by only negative symptoms or in attenuated form (e.g., odd beliefs, unusual perceptual experiences)