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Biological and Treatment Approaches to Schizophrenia

Outline of Explanations

Understanding schizophrenia involves highlighting abnormalities in brain chemistry and structure, coupled with psychological and environmental factors.

1

Biological Factors

Abnormalities in chemistry (Dopamine) and structure (Ventricles).
2

Individual Differences

Cognitive disturbances and symptom patterns (Thought Disorder).
3

Social Psychology

Impact of family environment (EE) and cultural context.
4

Treatment Methods

Antipsychotic drugs and Cognitive Behavioral Therapy (CBT).

Core Mechanism: Dopamine Hypothesis

Excess Dopamine Activity → Positive Symptoms
The most influential biological theory suggests that excess dopamine activity, particularly in subcortical areas, causes positive symptoms like hallucinations and delusions. Antipsychotic drugs reducing dopamine alleviate these symptoms.

Cannabis Influence on Brain Chemistry

Risk Factor Spotlight

Cannabis use, especially in adolescence, is linked to increased schizophrenia risk. THC affects the endocannabinoid system, altering dopamine and glutamate neurotransmission. In susceptible individuals, cannabis can precipitate or worsen symptoms.

Structural Abnormality

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Enlarged Ventricles

Brain imaging studies reveal that people with schizophrenia often have enlarged cerebral ventricles, indicating loss of brain tissue. This structural abnormality relates to cognitive deficits and poor prognosis.

Core Cognitive Symptom

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Thought Disorder

A core symptom involves disorganized thinking, leading to incoherent speech and difficulty maintaining logical sequences. Thought disorder reflects underlying cognitive disturbances affecting communication and functioning.

Discredited Theory: The Schizophrenogenic Mother

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The TheoryAn outdated psychological theory blamed cold, rejecting mothers for causing schizophrenia in offspring.
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Current ImpactThough discredited, the theory influenced early treatment approaches and families' stigma.

Observation: Sex Differences in Onset

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Symptom Severity: Males often have earlier onset and more severe symptoms compared to females. Hormonal differences and brain development may explain these variations, influencing diagnosis and treatment outcomes.

Impact of Cultural Interpretation

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How do cultural norms affect diagnosis?
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Culture shapes how schizophrenia is expressed and interpreted. In some cultures, auditory hallucinations may be seen as spiritual experiences rather than pathological, affecting treatment engagement.

High Expressed Emotion (EE)

Family Environment Risk

High EE families exhibit critical, hostile, and emotionally over-involved attitudes towards the patient. This environment predicts relapse and poorer prognosis in schizophrenia. Dysfunctional families characterized by high family stress, communication deviance, and criticism are linked to symptom exacerbation and relapse.

Medication: Typical vs Atypical Drugs

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BenefitsAntipsychotic drugs block dopamine receptors, reducing positive symptoms. Atypical drugs target a wider neurotransmitter range with fewer side effects.
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DrawbacksTypical antipsychotics may cause severe side effects. Must be monitored carefully to manage risks versus therapeutic benefit.

Goals of Cognitive Behavioral Therapy (CBT)

CBT helps patients challenge and reinterpret symptoms, reducing distress and improving long-term functioning:

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Reinterpret Symptoms

CBT helps patients challenge and reinterpret delusions and hallucinations.
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Improve Coping

Reduce distress and improve coping skills.
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Treat Comorbidity

It addresses both psychotic symptoms and co-morbid conditions like depression or anxiety.
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Biological Explanations of Schizophrenia Deck
Term
Cannabis Use Effect

What effect does cannabis use have on schizophrenia risk?

Answer
Explanation

Cannabis, especially in adolescence, increases schizophrenia risk by altering dopamine and glutamate neurotransmission in susceptible individuals.

Term
Dopamine Hypothesis

What is the dopamine hypothesis in schizophrenia?

Answer
Explanation

It suggests excess dopamine activity in subcortical areas causes positive symptoms like hallucinations and delusions.

Term
Antipsychotic Drugs

How do antipsychotic drugs work in treating schizophrenia?

Answer
Explanation

They block dopamine receptors to reduce positive symptoms such as hallucinations and delusions.

Term
Brain Abnormality

What brain structural abnormality is common in schizophrenia?

Answer
Explanation

Enlarged cerebral ventricles indicating loss of brain tissue linked to cognitive deficits.

Term
Thought Disorder

What is the thought disorder symptom in schizophrenia?

Answer
Explanation

Disorganized thinking causing incoherent speech and difficulty maintaining logical thought sequences.

Term
'Schizophrenogenic Mother' Theory

What does the "schizophrenogenic mother" theory state?

Answer
Explanation

It is an outdated theory blaming cold and rejecting mothers for causing schizophrenia.

Term
Sex Differences

How do sex differences affect schizophrenia?

Answer
Explanation

Males typically have earlier onset and more severe symptoms than females due to hormonal and developmental factors.

Term
Cultural Norms

What role do cultural norms play in schizophrenia?

Answer
Explanation

Culture influences how symptoms are expressed and interpreted, affecting treatment engagement.

Term
Expressed Emotion (EE)

What is expressed emotion (EE) in families?

Answer
Explanation

Families with critical, hostile, or emotionally over-involved attitudes predict relapse and poorer prognosis.

Term
Cognitive Behavioral Therapy (CBT)

How does Cognitive Behavioral Therapy (CBT) help schizophrenia patients?

Answer
Explanation

CBT helps patients challenge delusions and hallucinations, reducing distress and improving coping skills.

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🌸 Biological Explanations of Schizophrenia Quiz

1. Which neurotransmitter’s excessive activity is central to the dopamine hypothesis of schizophrenia?

The dopamine hypothesis states that excess dopamine activity, especially in subcortical brain areas, causes positive symptoms.

2. How does cannabis use influence the risk of developing schizophrenia?

THC in cannabis alters dopamine and glutamate systems, increasing risk in vulnerable individuals.

3. What structural brain change is often seen in individuals with schizophrenia?

Enlarged ventricles suggest brain tissue loss which correlates with cognitive problems.

4. Which treatment targets dopamine to alleviate schizophrenia symptoms?

Antipsychotics block dopamine receptors to reduce hallucinations and delusions.

📊 Results

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