[The participation of the sensorimotor cortex in assessing the quality of food reinforcement against a background of thirst].

In trained cats, unilateral extirpation of the sigmoid gyri's cortex disinhibited the unreinforced runs while preserving the positive conditioned reflexes associated with differentiation of different salt food reinforcement. The bilateral extirpation induced a disorder of differentiated inhibition while preserving the conditioned runs reinforced with the highly salted food. The unilateral extirpation did not affect the food-motor conditioning against the background of the salt diet. The bilateral extirpation delayed the differentiation inhibition and facilitated the positive conditioning.