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Aversive picture processing: effects of a concurrent task on sustained defensive system engagement
Bethany C Wangelin1, Andreas Löw, Lisa M McTeague
1NIMH Center for the Study of Emotion and Attention, University of Florida, Gainesville, Florida 32608, USA. wangelin@ufl.edu
Psychophysiology
|June 12, 2010
Summary
Viewing aversive images triggers defensive responses. A concurrent visual task largely preserved emotional activation, but slightly reduced startle reflexes and electrocortical measures, showing dual motivational circuit engagement.
Area of Science:
- Psychology
- Neuroscience
- Cognitive Science
Background:
- Aversive stimuli elicit emotional reactivity and sustained defensive engagement.
- Understanding how concurrent tasks modulate these defensive states is crucial for cognitive and emotional research.
Purpose of the Study:
- To investigate the impact of a concurrent visual task on multiple components of the defensive state triggered by aversive images.
- To explore the interaction between survival-relevant stimuli and task-relevant stimuli on motivational circuits.
Main Methods:
- Participants viewed a series of aversive pictures.
- A concurrent visual task was administered to assess its effects on defensive responses.
- Autonomic, somatic, electrocortical, and facial measures of the defensive state were recorded.
Main Results:
- Emotional activation was largely maintained despite the concurrent visual distraction.
- The startle reflex and electrocortical measures showed some evidence of attenuation.
- Task-specific reactivity was observed, indicating simultaneous activation of different motivational circuits.
Conclusions:
- Motivational circuits can be activated by both intrinsic survival significance and instructed task significance.
- Concurrent tasks modulate defensive engagement, with differential effects across various response components.
- These findings highlight the complex interplay between emotional reactivity and cognitive load.
