Modular device for analog electroencephalography synchronization with oscillating electrical light-related events and motor behaviors, comprising function modules of the following types: a motor response processing module; an electrical oscillation processing module; a light processing module; and a power feed and control module comprising a power switch, a power input and a voltage safety control, and means to distribute electricity to the function modules; wherein the motor response processing module comprises a selector switch, a behavioral response inlet comprising two single-reference channels connectable to a button unit and a motor response module trigger outlet, wherein the motor response processing module is configured to produce at its outlet square waves with durations substantially identical to the signal at the inlet, wherein the voltage range of said square waves depends on the position of the selector switch and is intended for a DC or AC channel of digital EEG equipment; and wherein the electrical oscillation processing module comprises a selector switch, an electrical oscillations inlet comprising two single-reference input channels and an electrical oscillation module trigger outlet, wherein the electrical oscillation processing module is configured to produce at its outlet square waves with durations substantially identical to the signal at the inlet, wherein the voltage range of said square waves depends on the position of the selector switch and is intended for a DC or AC channel of digital EEG equipment; and wherein the light processing module comprises a selector switch, a photocell inlet, and an electrical oscillation module trigger outlet, wherein the light processing module is configured to produce at its outlet square waves with durations substantially identical to the signal at the inlet, wherein the voltage range of said square waves depends on the position of the selector switch and is intended for a DC or AC channel of digital EEG equipment. a motor response processing module; an electrical oscillation processing module; a light processing module; and a power feed and control module comprising a power switch, a power input and a voltage safety control, and means to distribute electricity to the function modules; wherein the motor response processing module comprises a selector switch, a behavioral response inlet comprising two single-reference channels connectable to a button unit and a motor response module trigger outlet, wherein the motor response processing module is configured to produce at its outlet square waves with durations substantially identical to the signal at the inlet, wherein the voltage range of said square waves depends on the position of the selector switch and is intended for a DC or AC channel of digital EEG equipment; and wherein the electrical oscillation processing module comprises a selector switch, an electrical oscillations inlet comprising two single-reference input channels and an electrical oscillation module trigger outlet, wherein the electrical oscillation processing module is configured to produce at its outlet square waves with durations substantially identical to the signal at the inlet, wherein the voltage range of said square waves depends on the position of the selector switch and is intended for a DC or AC channel of digital EEG equipment; and wherein the light processing module comprises a selector switch, a photocell inlet, and an electrical oscillation module trigger outlet, wherein the light processing module is configured to produce at its outlet square waves with durations substantially identical to the signal at the inlet, wherein the voltage range of said square waves depends on the position of the selector switch and is intended for a DC or AC channel of digital EEG equipment.