Michael N. Hallquist

This study investigates how interactions between the prefrontal default-mode network and posterior hippocampus influence exploration versus exploitation in a continuous reward environment using fMRI and reinforcement learning modeling.

This study examines reward value encoding in individuals with depression and suicide attempts using fMRI during decision-making tasks, finding distinct neural patterns associated with different types of suicide attempts.

The paper investigates how impulsivity in adolescents with BPD symptoms affects facial emotion processing, finding that impulsivity leads to inefficient processing and lower decision thresholds.

The paper investigates how functional connectivity patterns in brain networks predict symptoms of borderline personality disorder in adolescents and young adults using fMRI data.

The paper shows that human dorsal stream uses reinforcement learning dynamics to manage exploration and exploitation in continuous spaces by compressing less preferred options.

The paper examines how learning signals in the default network during social exchanges support both cooperation and exploitation, linking neural activity to prosocial and antisocial behaviors.

This study shows that dopamine release in the ventral striatum is linked to reward learning, not just reward processing, using combined PET and fMRI in humans.

The paper examines functional and effective connectivity in adolescents and young adults with borderline personality symptoms, finding heightened insula connectivity and impaired DAN network fluctuations.

The paper examines how effective connectivity in the amygdala and prefrontal cortex predicts the stability of emotion-related impulsivity in adolescents with borderline personality symptoms over a year.

The paper shows that the posterior hippocampus supports exploration while the anterior hippocampus supports the transition to exploitation in a reinforcement learning task.

This paper shows that selectively maintaining high-value information helps resolve the exploration/exploitation dilemma in decision-making, performing as well as uncertainty-driven exploration but with lower cognitive load.

The paper reviews 106 resting-state functional connectivity studies, identifies methodological challenges in graph theory analysis of brain disorders, and suggests improvements for future research.