Globus pallidus dynamics reveal covert strategies for behavioral inhibition.
Elife
; 92020 06 10.
Article
in En
| MEDLINE
| ID: mdl-32519952
Flexible behavior requires restraint of actions that are no longer appropriate. This behavioral inhibition critically relies on frontal cortex - basal ganglia circuits. Within the basal ganglia, the globus pallidus pars externa (GPe) has been hypothesized to mediate selective proactive inhibition: being prepared to stop a specific action, if needed. Here we investigate population dynamics of rat GPe neurons during preparation-to-stop, stopping, and going. Rats selectively engaged proactive inhibition towards specific actions, as shown by slowed reaction times (RTs). Under proactive inhibition, GPe population activity occupied state-space locations farther from the trajectory followed during normal movement initiation. Furthermore, the state-space locations were predictive of distinct types of errors: failures-to-stop, failures-to-go, and incorrect choices. Slowed RTs on correct proactive trials reflected starting bias towards the alternative action, which was overcome before progressing towards action initiation. Our results demonstrate that rats can exert cognitive control via strategic adjustments to their GPe network state.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Behavior, Animal
/
Globus Pallidus
Limits:
Animals
Language:
En
Journal:
Elife
Year:
2020
Document type:
Article
Affiliation country:
United States
Country of publication:
United kingdom