Catecholaminergic neuromodulation and selective attention jointly shape perceptual decision-making

Area of Science:

• Neuroscience
• Cognitive Science
• Psychology

Background:

• Perceptual decision-making is influenced by neural activity, attention, and neuromodulators.
• The precise roles of neuromodulators and their interaction with attention in decision-making remain unclear.

Purpose of the Study:

• To investigate how cholinergic and catecholaminergic systems, alongside spatial attention, modulate human perceptual decision-making.
• To determine if neuromodulatory systems control attentional processes.

Main Methods:

• Pharmacological elevation of cholinergic (donepezil) and catecholaminergic (atomoxetine) levels in human participants.
• Performance of a visuo-spatial attention task while measuring electroencephalography (EEG).
• Analysis using drift diffusion modeling and univariate EEG analyses.

Main Results:

• Both attention and catecholaminergic enhancement improved behavioral and algorithmic decision-making, increasing perceptual sensitivity and modulating drift rate.
• EEG data revealed modulation of cortical excitability, sensory activity, and evidence accumulation by attention and catecholamines.
• Similar, unique, and interactive effects were observed between attention and catecholaminergic neuromodulation.

Conclusions:

• This study elucidates the intricate relationship between attentional and catecholaminergic systems in shaping perceptual decision-making.
• Findings advance the understanding of how these systems jointly influence various stages of the decision process.