[Flexible Neural Encoding and Cognitive Function in the Frontal Lobe].

The frontal lobe is involved in various aspects of behavioral expression and is one of the neural bases supporting flexible behavioral selection. Here, we consider six points: (1)the diversity of frontal lobe functions that support behavior, (2)flexible information representation at the cellular level, (3)representation of behavioral context by oscillatory states, (4)the scale-free nature of fluctuations in brain activity, and (5)the possibility of critical states at the cellular level seen in fluctuations and synchronization. Finally, we consider (6)the semiotic significance of the nervous system in cognition.