Biological expl - neural correlates Flashcards

1
Q

What are neural correlates?

A

Measurements of the structure or function of the brain that occur in conjunction with an experience - in this case to see if they correlate with the symptoms of schizophrenia - both positive and negative symptoms have neural correlates

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2
Q

What are the neural correlates for negative symptoms?

A

Certain areas of the ventral straitum - are believed to be responsible for motivation
Prefrontal cortex - too little dopamine associated with negative symptoms such as avolition

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3
Q

What is the study for neural correlates for negative symptoms? What type of correlation is this? What does this mean?

A

Jucket et al (2006) measured activity of the ventral staitum in schizophrenics and found lower levels of activity than in control groups
This is a negative correlation, as when activity in the ventral straitum decreased the severity of negative symptoms increased
This means activity in the ventral straitum and prefrontal cortex is a neural correlate of schizophrenia

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4
Q

What are the neural correlates for positive symptoms?

A

The superior temporal gyrus - seems to be responsible for hallucinations
Subcortex - too much dopamine in this area is associated with auditory hallucinations

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5
Q

What is the study for neural correlates for positive symptoms? What did they find? What type of correlation is this?

A

Allen et al (2007) - scanned brains of schizophrenics who tried to distinguish between their voices and other peoples voices - they found lower activation in the superior temporal gyrus area and more errors by the schizophrenic group in comparison to control groups
This is a negative correlation and is therefore a neural correlate of auditory hallucinations

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