Gerhard Jocham

This study investigates how acetylcholine and noradrenaline influence perceptual decision making and learning by modulating the updating of prior expectations.

This study manipulates GABA and NMDA receptors in humans to show that GABAergic inhibition increases neuronal timescales and alters large-scale network dynamics.

This study shows dopamine modulates how much reward attributes influence decisions without changing the integration strategy.

This study investigates how muscarinic acetylcholine receptors influence reinforcement learning under uncertainty using a gambling and learning task with MEG recordings.

The paper investigates patch-leaving decisions using pupil dilation as a measure of neuromodulation, finding increased pupil dilation before leave decisions and linking it to LC-NE activity.

This study compares phasic and tonic transcutaneous auricular vagus nerve stimulation (taVNS) effects on pupil dilation, finding both induce rapid but transient responses, suggesting they primarily modulate phasic noradrenergic activity.

This study investigates the roles of dopamine and acetylcholine in human decision-making, finding that dopamine affects both effort and delay discounting, while acetylcholine specifically influences effort discounting.

This study shows that removing reinforcement in humans improves instrumental performance by reducing a general action bias, not by unmasking learned associations.

The paper evaluates how different levels of co-fluctuation in functional connectivity predict individual-level phenotypes using machine learning.

This study shows estradiol increases reward sensitivity in men, with effects moderated by baseline dopamine levels.

This study identifies reinstatement of cortical outcome representations during second-order conditioning in humans using fMRI.

The paper shows that cortical excitation-inhibition balance in different brain regions is associated with distinct decision-making processes: patch-leaving in dACC and value-guided choices in vmPFC.

The paper shows that making a choice without outcomes modifies hippocampal memories and biases future decisions.