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ccnbook-executive_summary [2018/06/03 10:04] n.arakawa created |
ccnbook-executive_summary [2018/06/03 10:14] (current) n.arakawa |
This article tries to summarize the PBWM (Prefrontal cortex Basal ganglia Working Memory) model in [[https://grey.colorado.edu/CompCogNeuro/index.php/CCNBook/Executive|the Executive chapter]] of [[https://grey.colorado.edu/CompCogNeuro/index.php/CCNBook/Main|the CCNBook]]. The PBWM model is further explained in O’Reilly & Frank’s paper: [[http://psych.colorado.edu/~oreilly/papers/OReillyFrank06_pbwm.pdf|Making Working Memory Work: A Computational Model of Learning in the Prefrontal Cortex and Basal Ganglia]], Neural Comput., 18(2) (2006). | This article tries to summarize the PBWM (Prefrontal cortex Basal ganglia Working Memory) model in [[https://grey.colorado.edu/CompCogNeuro/index.php/CCNBook/Executive|the Executive chapter]] of [[https://grey.colorado.edu/CompCogNeuro/index.php/CCNBook/Main|the CCNBook]]. The PBWM model is further explained in O’Reilly & Frank’s paper: [[http://psych.colorado.edu/~oreilly/papers/OReillyFrank06_pbwm.pdf|Making Working Memory Work: A Computational Model of Learning in the Prefrontal Cortex and Basal Ganglia]], Neural Comput., 18(2) (2006). |
Here are points: | Here are points: |
The executive function requires controlling (i.e., keeping & releasing) states. | * The executive function requires controlling (i.e., keeping & releasing) states. |
The states are held in PFC. | * The states are held in PFC. |
The control is carried out with the reinforcement learning mechanism described in [[https://grey.colorado.edu/CompCogNeuro/index.php/CCNBook/Motor|the Motor chapter]] (cf. [[ccnbook-motor_summary|the nutshell]]). | * The control is carried out with the reinforcement learning mechanism described in [[https://grey.colorado.edu/CompCogNeuro/index.php/CCNBook/Motor|the Motor chapter]] (cf. [[ccnbook-motor_summary|the nutshell]]). |
A figure explaining the model, conformable to the last figure in [[ccnbook-motor_summary|the Motor nutshell]], is found in O’Reilly & Frank’s paper. | Figure 1 is from Figure 5 in O’Reilly & Frank’s paper slightly modified explaining the model conformable to the last figure in [[ccnbook-motor_summary|the Motor nutshell]]. |
| {{}} | | | {{ccnexecutivenutshell1.png}} | |
| **Figure 5** (from [[CCNBook]]) | | | **Figure 1** | |
Here, BG is controlling gates for states in PFC, while it was for controlling in general in the Motor chapter. Posterior Cortex in the figure may mean a cortical region ‘posterior’ to PFC. | Here, BG is controlling gates for states in PFC, while it was for controlling in general in the Motor chapter. Besides the gating, BG also controls output (Figure 10.11). |
Besides the gating, BG also controls output (Figure 10.11). | | {{https://grey.colorado.edu/mediawiki/sites/CompCogNeuro/images/c/cd/fig_pbwm_architecture_mnt_out.png}} | |
| | **Figure 10.11** (from [[https://grey.colorado.edu/CompCogNeuro/index.php/File:fig_pbwm_architecture_mnt_out.png|CCNBook]]) | |
| **Figure 10.11** (from [[CCNBook]]) | | |
For a most abstract level of understanding, these figures will suffice. | For a most abstract level of understanding, these figures will suffice. |
The chapter notes that there is a hierarchy of control in the frontal cortex (Figure 10.16). | The chapter notes that there is a hierarchy of control in the frontal cortex (Figure 10.16). |
| | {{https://grey.colorado.edu/mediawiki/sites/CompCogNeuro/images/thumb/b/b7/bgpfc_hier_Probs.png/320px-bgpfc_hier_Probs.png}} | |
| **Figure 10.16** (from [[CCNBook]]) | | | **Figure 10.16** (from [[https://grey.colorado.edu/CompCogNeuro/index.php/File:bgpfc_hier_Probs.png|CCNBook]]) | |