[The neuronal activity of the frontal cortex in dogs during a shift in motor conditioned reflex programs]

Two groups of units with different discharge patterns were identified in dog's frontal cortex during reinforcement period of reversal conditioning. Activity of the first group of units was closely related to reinforcement presentation and was influenced by reward/nonreward history in trials preceding the current one. Units of the second group displayed tonic increase of firing which followed food ingestion and persisted for 4-10 s.