Contextual neural dynamics during time perception in the primate ventral premotor cortex DOI Creative Commons
Héctor Díaz,

Lucas Bayones,

M. Álvarez

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2025, Volume and Issue: 122(6)

Published: Feb. 6, 2025

Understanding how time perception adapts to cognitive demands remains a significant challenge. In some contexts, the brain encodes categorically (as “long” or “short”), while in others, it precise intervals on continuous scale. Although ventral premotor cortex (VPC) is known for its role complex temporal processes, such as speech, specific involvement estimation underexplored. this study, we investigated VPC processes information during interval comparison task (TICT) and categorization (TCT) primates. We found notable heterogeneity neuronal responses associated with across both tasks. While most neurons responded presentation, smaller subset retained working memory periods. Population-level analysis revealed distinct dynamics between tasks: TICT, population activity exhibited linear parametric relationship duration, whereas TCT, diverged into two corresponding categories. During delay periods, these categorical representations remained consistent within each context. This contextual shift underscores VPC’s adaptive highlights are modulated by demands.

Language: Английский

Contextual neural dynamics during time perception in the primate ventral premotor cortex DOI Creative Commons
Héctor Díaz,

Lucas Bayones,

M. Álvarez

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2025, Volume and Issue: 122(6)

Published: Feb. 6, 2025

Understanding how time perception adapts to cognitive demands remains a significant challenge. In some contexts, the brain encodes categorically (as “long” or “short”), while in others, it precise intervals on continuous scale. Although ventral premotor cortex (VPC) is known for its role complex temporal processes, such as speech, specific involvement estimation underexplored. this study, we investigated VPC processes information during interval comparison task (TICT) and categorization (TCT) primates. We found notable heterogeneity neuronal responses associated with across both tasks. While most neurons responded presentation, smaller subset retained working memory periods. Population-level analysis revealed distinct dynamics between tasks: TICT, population activity exhibited linear parametric relationship duration, whereas TCT, diverged into two corresponding categories. During delay periods, these categorical representations remained consistent within each context. This contextual shift underscores VPC’s adaptive highlights are modulated by demands.

Language: Английский

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