Instrumental Avoidance Promotes Safety Learning Across Distributed Neural Circuits.

Area of Science:

• Neuroscience
• Psychology
• Cognitive Science

Background:

• Instrumental avoidance is a key coping mechanism in anxiety and trauma disorders.
• Neural underpinnings of avoidance and its interplay with extinction learning require further elucidation.

Purpose of the Study:

• To investigate the neural mechanisms of instrumental avoidance and its interaction with extinction learning.
• To explore how controllable avoidance influences threat regulation and safety learning.

Main Methods:

• fMRI in 59 healthy adults, including threat conditioning, avoidance learning, extinction, and recall.
• Analysis of subjective fear ratings and neural responses using GLM and MVPA with a threat/safety decoder.
• Replication in an independent cohort (n=59) with a variant design.

Main Results:

• Successful fear acquisition, avoidance learning, and extinction were confirmed by subjective ratings.
• Instrumental avoidance engaged the ventromedial prefrontal cortex, amygdala, and striatum.
• A rapid neural shift from threat to safety representations occurred with avoidance, predicting reduced neural recruitment during extinction.

Conclusions:

• Controllable avoidance facilitates adaptive threat regulation and consolidates long-term safety learning.
• Findings suggest potential therapeutic implications for anxiety and trauma-related disorders.
• Avoidance-related neural shifts support extinction and memory consolidation.