Jenny Imhof

This study investigates whether pupil size reflects physical effort or motor fatigability during sustained repetitive movement and finds that it reflects effort but not fatigability.

This study shows reward reduces motor slowing during repetitive wrist tapping by increasing movement vigor, as indicated by higher muscle activity and sustained pupil dilation.

This study shows that human participants can voluntarily control their arousal state using pupil-based biofeedback, which modulates brainstem activity and physiological responses.