Andrew M. Wikenheiser

This paper introduces a modified Progressive Ratio task with reset options to study adaptive effort-delay tradeoffs in rats, finding they exhibit systematic biases in their decision-making strategies.

This study shows rats balance food and leisure by adjusting their time allocation based on switching costs, following rational decision-making principles similar to foraging models.

The paper investigates how uncertainty modulates neural coding of choice and outcome in orbitofrontal (OFC) and secondary motor cortex (M2) during reward learning, finding differential roles in encoding under varying uncertainty levels.

The paper introduces an adaptable implant for chronic Neuropixels recordings in mice, enabling stable, reusable, and lightweight neural recordings across multiple experimental conditions.

This study shows that rats adjust their risk preferences based on environmental richness, spending more time on low-variance options with short travel delays.

The paper tracks and manipulates striatal neuron activity during goal-directed learning and habit formation, finding D1+ neurons maintain stable action representations while A2A+ neurons show transient or slow reorganization.

This study shows that prior cocaine use changes neural ensemble representations in the orbitofrontal cortex, affecting decision-making in rats.

This study investigates how theta oscillations in ACC and OFC affect accuracy and speed in reward learning, finding ACC inhibition impairs reversal learning while OFC theta remains unaffected.

This paper identifies a bidirectional corticoamygdala circuit that encodes and retrieves detailed reward memories in rats, showing its role in adaptive decision making.

This study shows that rat orbitofrontal cortex activity represents both a value-invariant task structure and expected value during an odor sequence task.