Year: 2006
Type: article
Abstract: A system-level model of spatial working memory is described, using the author's computer science and logical modeling approach.The mental image which is remembered is located in a lateral parietal area, and is part of a larger distributed representation including object identities and object appearances.The system is driven by plans which are stored in a separate module corresponding to ventral prefrontal and then copied to a planning module corresponding to dorsal prefrontal, where they are executed and sequenced.Mental images are maintained by explicit messages from a currently executed plan.Upon a cue to use a saved mental image for motor output or eye movement, a message from the plan causes the image to be temporarily reinstated allowing it to be used for motor control.We describe a gradual approach to deficits in which a goal attenuates, causing the plan to fall below a threshold.This approach allowed us to match the experimental results of Conklin et al. in which schizophrenic and schizoptypal subjects could carry out a spatial working memory task with a 0.5 second delay but not when there was a 7 second delay.
Author: Alan H. Bond
Language: English
Subfield: Cognitive Neuroscience
Field: Neuroscience
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W2769635971