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The promise of intelligent decision support systems is presented as a harbinger for humankind. With the potential partnership between the human and autonomous system we could see a significant increase in effectiveness and safety. However, as we see both human and agent team members being integrated we must investigate ways in which we can assess not only the interaction between the two actors, but also the very nature of trust perceived by the human. In this paper we present early findings of an experiment that examines the human-autonomy interaction across different frameworks of authority; from manual to fully autonomous. Participants were asked to interact with a ground control station that supervised several unmanned systems, and presented with goals that required manually selecting or approving assets to achieve mission goals. The use of neuroimaging (in this instance Functional Near Infrared Spectroscopy - fNIRS) was used to establish neuro-correlates of trust within the prefrontal cortical region of the brain. Initial findings suggest that the dorsolateral prefrontal cortical region of the brain is heavily associated when humans are confronted with different levels of authority with human-autonomy interaction.