schizophrenic disorders symptoms diagnosis causes treatment and management
TRANSCRIPT
Schizophrenic Disorders
Symptoms
Diagnosis
Causes
Treatment and Management
OVERVIEW Psychosis - A state of being profoundly out of
touch with reality Most common symptoms: changes in the
way a person thinks, feels, and relates to other people and the outside environment.
Involves disruptions of mental functions No single symptom or specific set of
symptoms is characteristic of patients.
OVERVIEW
Devastating disorder for both the
patients & families.
Among mental disorders, the second
leading cause of disease burden.
OVERVIEW Onset typically occurs during
adolescence or early adulthood. The period of risk is considered to be between 15 and 35.
The problems of most patients can be divided into three phases of variable and unpredictable duration: prodromal phase (developing)active phase (psychotic symptoms)residual phase (no longer psychotic
but still showing signs of schizophrenia)
What Schizophrenia Isn’t… Debunking myths -
Not “split personality”Not inherently violent or homicidal
SYMPTOMS Positive Symptoms--Type I
Hallucinations○ Perceptual disturbances○ Can occur in any of the senses○ Persistent over time
SYMPTOMS
Delusional Beliefs○ FALSE Idiosyncratic beliefs that are rigidly held in spite of their preposterous nature.
Subtypes:- Grandeur- Persecution- Reference- Nihilistic
- Capgras’ syndrome- Cotard’s syndrome
SYMPTOMS Disorganization
Thinking Disturbances○ Involves disorganized speech – say things
that do not make sense.Word saladLoose associations or derailmentPerserveration
Symptoms
• Disorganized speech or thought
• Neologisms
• Clang associations
• Echolalia
SYMPTOMS Disorganization
Bizarre Behavior○ Catatonia
Stuporous state – reduced responsiveness.EchopraxiaDisheveledChildlike Behavior
○ Inappropriate affect
SYMPTOMS Negative Symptoms--Type II
Lack of initiative, social withdrawal, deficits in emotional responding.
○ Affective flattening, Blunted affect○ Anhedonia – inability to experience pleasure.○ Apathy - Socially withdrawn
Both a symptom and coping strategy○ Avolition – lack of will, motivation○ Alogia – impoverished thinking, poverty of speech.
Classifying Schizophrenia: The DSM-IV-TR Criteria Two or more of the following:
DelusionsHallucinationsDisorganized speechGrossly disorganized or catatonic
behaviorNegative symptoms
Social/occupational dysfunction and decline
Six month duration of symptoms
TABLE 13-1 Diagnosis Criteria for Schizophrenia
A. Characteristic Symptoms: Two (or more) of the following, eachpresent for a significant portion of time during a 1-month period (or less if successfully treated): 1. Delusions 2. Hallucinations 3. Disorganized speech (such as frequent derailment or incoherence) 4. Grossly disorganized or catatonic behavior 5. Negative symptoms, such as affective flattening, alogia, or avolition
B. Social/Occupational Dysfunction: For a significant portion of the time since the onset of the disturbance, one or more major areas of functioning such as work, interpersonal relations, or self-care is markedly below the level achieved prior to the onset.
C. Duration: Continuous signs of the disturbance persist for at least six months. This six-month period must include at least one month of symptoms that meet Criterion A (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 two or more symptoms listed in Criterion A present in an attenuated form (such as odd beliefs, unusual perceptual experiences).
DIAGNOSIS Subtypes
Schizophrenia is a heterogeneous disorder with many different clinical manifestations and levels of severity.○ Paranoid Type○ Disorganized Type○ Catatonic Type○ Undifferentiated Type○ Residual Type
DIAGNOSIS
Related Psychotic Disorders
Brief psychotic disorder = symptoms < 1 month Schizophreniform disorder = symptoms for 1-6
months “Schizophrenic spectrum” also includes:
Schizoaffective disorderDelusional disorderShared delusional disorderParanoid and schizotypal personality disorders
FREQUENCY
Gender Differences♂: 30 to 40% more likely to develop
schizophrenia than ♀.Differences between ♂ and ♀ onset,
symptoms, and course of the disorder.
CAUSESTWIN STUDIES ADOPTION STUDIES
The average concordance rate for MZ twins is 48%, whereas the comparable figure for DZ twins is 17%.
Suggests strong genetic factors.
Also compelling evidence for the importance of environment.
Genain quadruplets
Genetic factors play role in development of the disorder (Heston).
CAUSESPREGANANCY AND BIRTH COMPLICATIONS
VIRAL INFECTIONS
More likely than the general population to have been exposed to various problems during their mother’s pregnancy and to have suffered birth injuries.
Dietary factors
Somewhat more likely to have been born during the winter/spring when viral infections are more prominent.
FIGURE 13-3
Disorder seems to affect many different regions of the brain.Enlarged lateral ventriclesDifferences (decreased size) in parts of the limbic system.
CAUSES
Biological Components: Immediate CausesBrain function abnormalities: hypofrontality, neurotransmission,
dopamine hypothesis
Brain structure abnormalities
Neuropsychological/neurophysiological abnormalities: impaired cognition, sensory gating, visual tracking
CAUSESThe dopamine hypothesis Interactions of multiple
neurotransmitters
Focuses on the function of dopamine in the limbic area of the brain.
Hypothesis grew out of attempts to understand how antipsychotic drugs improve the adjustment of schizophrenic patients.
Current research focuses many neurotransmitters:SerotoninGABA Glutamate
CAUSES
Psychological FactorsExpressed Emotion
○ The family environment does have a significant impact on the course (as opposed to the etiology) of schizophrenia.
○ Patients who relapsed seemed to react negatively to some feature of their close relationship with their family.
○ See Figure 13.5
TREATMENT
Antipsychotic MedicationHave a relatively specific effect- reduce
psychotic symptomsPositive symptoms respond better than
negative symptoms.A substantial minority of patients,
perhaps 25% do not improve on classical antipsychotic drugs.
See Figure 13.7 relapse rate
TREATMENT Antipsychotic Medication
Motor Side Effects
○ Extrapyramidal symptoms
○ Tardive dyskinesia
TREATMENT Antipsychotic Medication
Second-Generation Antipsychotics○ Atypical antipsychotics
○ Work on both serotonin and dopamine○ Impact both positive and negative symptoms