ELECTRIC/MAGNETIC CENTRAL NERVOUS SYSTEM STIMULATION

In this section the papers applied electric, magnetic, optical stimulation or X-ray irradiation to brain structures. It also included operant self-stimulation experiments.

ENVIRONMENT AND SOCIAL BEHAVIOR

In this section the papers analyze social behavior and environmental enrichment-dependent behaviors.

EXPLORATORY ACTIVITY

These papers measure exploratory activity also in relation to “anxiety” as the performed measure relates to this activity.