Prediction-based neural mechanisms for shielding the self from existential threat

Area of Science:

• Neuroscience
• Cognitive Psychology
• Existential Psychology

Background:

• Humans possess an innate tendency to avoid confronting their mortality.
• The neuronal underpinnings of this death-denial mechanism remain largely unexplored.

Purpose of the Study:

• To investigate the hypothesis that prediction-based neural mechanisms mediate death-denial.
• To explore how self-specific predictive processes are modulated by death-related stimuli.
• To establish a link between these neural mechanisms and the fear of death.

Main Methods:

• Utilized magnetoencephalography (MEG) with a visual mismatch paradigm.
• Coupled death-related words with self-face and other-face representations.
• Employed a behavioral active inference experiment using morphed facial stimuli.

Main Results:

• Self-specific predictive processes were downregulated when perceiving death-related stimuli.
• The brain's automatic prediction response to deviancy was eliminated when death words were coupled with self-faces, but not other-faces or negative words.
• A functional link was found between the impact of death on self-image versus other-image, predicting fear of death.

Conclusions:

• The study proposes a plausible neural basis for death-denial, involving the downregulation of self-specific predictive processes.
• This mechanism appears to shield the self from existential threat.
• Findings suggest that modulating self-perception is key to understanding and potentially mitigating existential anxiety.