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3MB Psychiatry: Neurobiology of Mood

Biology8 CardsCreated 4 days ago

This flashcard set explains the brain’s appetitive (approach) and aversive (defensive) mood systems, describing how they drive behaviour toward reward or avoidance of threat, and identifies the key neurotransmitters associated with each—dopamine for approach and serotonin for avoidance.

What is the function appetitive/approach mood systems in the brain?

Behave in a way to seek pleasurable factors/things that will benefit us

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Key Terms

Term
Definition

What is the function appetitive/approach mood systems in the brain?

Behave in a way to seek pleasurable factors/things that will benefit us

What is the function of aversive/defensive mood systems in the brain?

Behave in a way to avoid adversity and threats to our survival

Which chemical is generally associated with appetitive/approach behaviour?

Dopamine

Which chemical is generally associated with aversive/defensive behaviour?

Serotonin

There is an increase in aversive behaviour in mania/hypomania. True/False?

False

Increase in aversive behaviour in depression; increase in appetitive behaviour in man...


Cortisol is low in depressed people. True/False?

False

Cortisol typically elevated

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TermDefinition

What is the function appetitive/approach mood systems in the brain?

Behave in a way to seek pleasurable factors/things that will benefit us

What is the function of aversive/defensive mood systems in the brain?

Behave in a way to avoid adversity and threats to our survival

Which chemical is generally associated with appetitive/approach behaviour?

Dopamine

Which chemical is generally associated with aversive/defensive behaviour?

Serotonin

There is an increase in aversive behaviour in mania/hypomania. True/False?

False

Increase in aversive behaviour in depression; increase in appetitive behaviour in mania


Cortisol is low in depressed people. True/False?

False

Cortisol typically elevated

List the key regions of the brain implicated in mood disorders

Orbital + ventromedial prefrontal cortex

Dorsolateral prefrontal cortex

Hippocampus

Amygdala

Anterior cingulate cortex

What is the effect of major depression on hippocampal volume?

Decrease in hippocampal volume