ACH, uncertainty, and cortical inference
Journal
Advances in Neural Information Processing Systems
Date Issued
2002
Author(s)
Dayan P
Abstract
Acetylcholine (ACh) has been implicated in a wide variety of tasks involving attentional processes and plasticity. Following extensive animal studies, it has previously been suggested that ACh reports on uncertainty and controls hippocampal, cortical and cortico-amygdalar plasticity. We extend this view and consider its effects on cortical representational inference, arguing that ACh controls the balance between bottom-up inference, influenced by input stimuli, and top-down inference, influenced by contextual information. We illustrate our proposal using a hierarchical hidden Markov model.
Other Subjects
Animal studies; Contextual information; Hierarchical Hidden Markov Model; Top-down inference; Plasticity
Type
conference paper