Neurodevelopmental changes in the relationship between stress perception and prefrontal-amygdala functional circuitry

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Neuroscience

Background:

• The developing brain exhibits varied responses to psychological stress.
• Research on neurodevelopmental changes in stress processing remains limited.
• Understanding these changes is crucial for addressing stress-related disorders.

Purpose of the Study:

• To investigate the relationship between perceived stress and neural connectivity patterns across different developmental stages.
• To examine how functional connectivity in brain circuits involved in emotion regulation changes with age.
• To identify potential neurodevelopmental trajectories of stress response.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to assess resting-state neural connectivity.
• Sixty-seven healthy participants were divided into three age groups: adolescents, young adults, and adults.
• Perceived stress levels were measured using self-report questionnaires.

Main Results:

• No significant differences in self-reported stress levels were found across age groups.
• Functional connectivity between the amygdala and ventromedial prefrontal cortex (vmPFC) showed age-dependent correlations with perceived stress.
• Adolescents displayed positive correlations, young adults negative correlations, and adults no significant correlation.
• Causal functional interactions within the amygdala-prefrontal cortex circuitry shifted from unidirectional to bilateral connectivity during development.

Conclusions:

• The amygdala and prefrontal cortical circuits undergo significant functional reorganization during neurodevelopment.
• These developmental changes in neural connectivity influence how individuals process stress.
• Findings have implications for understanding and treating stress-related affective disorders in youth.