Decreased Beta Power and OFC-STN Phase Synchronization during Reactive Stopping in Freely Behaving Rats.
J Neurosci
; 44(32)2024 Aug 07.
Article
en En
| MEDLINE
| ID: mdl-38866485
ABSTRACT
During natural behavior, an action often needs to be suddenly stopped in response to an unexpected sensory input-referred to as reactive stopping. Reactive stopping has been mostly investigated in humans, which led to hypotheses about the involvement of different brain structures, in particular the hyperdirect pathway. Here, we directly investigate the contribution and interaction of two key regions of the hyperdirect pathway, the orbitofrontal cortex (OFC) and subthalamic nucleus (STN), using dual-area, multielectrode recordings in male rats performing a stop-signal task. In this task, rats have to initiate movement to a go-signal, and occasionally stop their movement to the go-signal side after a stop-signal, presented at various stop-signal delays. Both the OFC and STN show near-simultaneous field potential reductions in the beta frequency range (12-30â
Hz) compared with the period preceding the go-signal and the movement period. These transient reductions (â¼200â
ms) only happen during reactive stopping, which is when the stop-signal was received after action initiation, and are well timed after stop-signal onset and before the estimated time of stopping. Phase synchronization analysis also showed a transient attenuation of synchronization between the OFC and STN in the beta range during reactive stopping. The present results provide the first direct quantification of local neural oscillatory activity in the OFC and STN and interareal synchronization specifically timed during reactive stopping.
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Banco de datos:
MEDLINE
Asunto principal:
Ritmo beta
/
Corteza Prefrontal
/
Núcleo Subtalámico
Límite:
Animals
Idioma:
En
Revista:
J Neurosci
Año:
2024
Tipo del documento:
Article
País de afiliación:
Países Bajos