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Related Experiment Videos

The interaction between mood and cognitive function studied with PET

S C Baker1, C D Frith, R J Dolan

  • 1Wellcome Department of Cognitive Neurology, Institute of Neurology, London.

Psychological Medicine
|May 1, 1997
PubMed
Summary
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Induced mood states alter brain activity during cognitive tasks. Depressed mood specifically reduces activation in the anterior cingulate cortex, suggesting a neural basis for depression.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Psychiatry

Background:

  • Experimentally induced depressed mood serves as a model for retarded depression.
  • This study investigates neural responses during induced mood states and their interaction with cognitive function.

Purpose of the Study:

  • To elucidate the neural underpinnings of experimentally induced mood states.
  • To identify the interaction between mood-regulating systems and cognitive processes.

Main Methods:

  • Normal subjects performed a verbal fluency task under induced elated and depressed mood conditions.
  • Regional cerebral blood flow (rCBF) was measured using Positron Emission Tomography (PET) to assess neural activity.

Main Results:

Related Experiment Videos

  • Both elated and depressed moods increased rCBF in the lateral orbitofrontal cortex; elated mood also showed increased midbrain rCBF.
  • Depressed mood decreased rCBF in the rostral medial prefrontal cortex.
  • Verbal fluency task activations were attenuated in prefrontal, premotor, cingulate cortex, and thalamus during both mood states, with anterior cingulate attenuation specific to depressed mood.

    • Conclusions:

    • Orbitofrontal cortex activation is linked to emotional experience.
    • Mood-induced modulation of cognitive task activation aligns with reduced resting-state function in depressed patients.
    • Resting-state rCBF may reflect spontaneous activity modulation by core systems dysfunctional in depression.