Neural Mechanisms Underlying Motivation of Mental Versus Physical Effort (original) (raw)
Figure 5
Dynamic causal modeling (DCM) analysis optimizing the connectivity structure of the striatal network.
In all illustrated models, the driving inputs were boxcar functions over effort exertion periods (Eff) for the caudate (Cd) and putamen (Pt) and over incentive display plus effort exertion modulated by expected reward (Rew) for the ventral striatum (VS). From left to right, connections were systematically added up to a fully connected network. From top to bottom: the locus of parametric modulation by cognitive (Cog) and motor (Mot) task demand was varied. Graphs illustrate the result of a Bayesian model selection (BMS) procedure used to find the most likely model.