chapter 11 Flashcards
what is schizophrenia
A chronic, debilitating psychological disorder impacting every part of a person’s life, characterized by a break in reality that typically takes place in the form of:
- hallucinations
- delusions
- pattern of aberrant behavior
Develops during late adolescence or early adulthood
- Suddenly, within a few weeks or months
positive symptoms
negative symptoms
hallucinations
Perceptions attributed to external stimuli confused with reality
Sensory distortions such as “hearing voices” or “seeing things”
delusions
Firmly held inaccurate beliefs despite reality
Fixed, false beliefs
phases of schizophrenia
prodromal phase
acute episode
residual phase
prodromal phase
The period of deterioration preceding the onset of acute symptoms
In schizophrenia, the period of decline in functioning that precedes the first acute psychotic episode
Characterized by subtle symptoms involving unusual thoughts or abnormal perceptions (but not outright delusions or hallucinations), as well as waning interest in social activities
acute episode
The emergence of clear psychotic features
lapses in job performance or schoolwork, speech becomes vague, hoards food, collects garbage, talking to oneself on the street → increasingly bizarre behavior
residual phase
Level of functioning that was typical of the prodromal phase
Follows acute episodes
In which their behavior returns to the level of the prodromal phase
Flagrant psychotic behaviors are absent, but the person is still impaired
Difficult functioning
positive symptoms
Flagrant symptoms such as hallucinations, delusions, bizarre behavior, thought disorder
negative symptoms
Behavioral symptoms as social skills deficit and withdrawal, flattened affect, poverty of speech/thought, failure to experience pleasure, psychomotor retardation
criteria for schizophrenia
A. Two (or more) of the following, each present for a significant portion of time during a 1 month period (or less if successfully treated). At least one of these must be (1), (2), or (3):
1. Delusions
2. Hallucinations
3. Disorganized speech (e.g., frequent derailment or incoherence)
4. Grossly disorganized or catatonic behavior
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 (or when the onset is in childhood or adolescence, there is failure to achieve expected level of interpersonal, academic, or occupational functioning)
C. continuous signs of disturbance persist for at least 6 months. This 6 month period must include at least 1 month of symptoms (or less ifi successfully treated) that meet Criterion A (ie., active phase symptoms) and may include periods of prodromal or residual symptoms. During these prodromal or residual periods, the signs of the disturbance may be manifested by only negative symptoms or by two or more symptoms listed in Criterion A present in an attenuated form (e.g., odd beliefs, unusual perceptual experiences)
D. schizoaffective disorder and depressive or bipolar disorder with psychotic features have been ruled out because either 1) no major depressive or manic episodes have occurred concurrently with the active phase symptoms, 2) if mood episodes have occurred during active-phase symptoms, they have been present for a minority of the total duration of the active and residual periods of the illness
E. The disturbance is not attributable to the physiological effects of a substance (e.g., a drug of abuse, a medication) or another medical condition
F If there is a history of autism spectrum disorder or a communication disorder of childhood onset, the additional diagnosis of schizophrenia is made only if prominent delusions or hallucinations, in addition to the other required symptoms of schizophrenia, are also present for at least 1 month (or less if successfully treated)
Disturbed thought and speech
Aberrant content of thought: delusions of thought
delusions of persecution or paranoia
delusions of reference
delusions of being controlled
delusions of grandeur
thought broadcasting
thought insertion
thought withdrawal
Delusions of persecution or paranoia
“The CIA is out to get me”
Delusions of reference
“People on the bus are talking about me”
“People on TV are making fun of me”
Delusions of being controlled
Believing that one’s thoughts, feelings, impulses, or actions are controlled by external forces such as agents of the devil
Delusions of grandeur
Believing oneself is to be Jesus
Thought broadcasting
“As I think, my thoughts leave my head on a type of mental ticker tape. Everyone around has only to pass the tape through their mind and they know my thoughts”
Thought insertion
“The garden looks nice and the grass looks cool, but the thoughts of [a man’s name] come into my mind. There are no other thoughts there, only his… He treats my mind like a screen and flashes his thoughts on it like you flash a picture”
Thought withdrawal
“I am thinking about my mother, and suddenly my thoughts are sucked out of my mind by a phrenological vacuum extractor, and there is nothing in my mind; it is empty”
thought disorder
A disturbance in thinking characterized by a breakdown in thoughts
Breakdown in:
- Organization
- Processing
- Control
Of thoughts
Attentional deficiencies
Eye movement dysfunction
and
Abnormal event related potentials
Eye movement dysfunction
Difficulty tracking a slow moving target across their field of vision
Eyes fall back and catch up in a jerky movement
Abnormal event related potentials
Abnormal brain wave patterns in response to external stimuli
Sensory ‘gating’ that suppresses does not supress does not disregard relevant stimuli
Difficulty filtering out irrelevant stimuli
Sensory overload and jumbling of sensations
Emotional disturbances
More negative and fewer positive emotions than healthy individuals
Flat affect
Less facial expressions
Perceptual disturbances
Hallucinations
- Sensory experiences in the absence of external stimulation in relation to the five senses
- Auditory are the most common (70%)
Attributed to:
- Disturbances in brain chemistry (high dopamine?)
- Inner speech/misattributed self talk attributed to external sounds
- Abnormal structure and connections in neurons