The EEG Laboratory
The PNI EEG Laboratory studies neuronal firing patterns via electroencephalography (EEG). The laboratory consists of two control rooms matched with two subject testing rooms, all of which are fully RF-shielded.
EEG Record Recording Equipment
Our primary system is a BioSemi package, composed of 64-channel and 128-channel caps, pin and flat-type active electrodes, and battery-powered ActiveTwo DC amplifier. The ActiveTwo system records EEG at a sampling rate of 2048 Hz and applies a DC-400Hz bandwidth. ActiView software is used for data acquisition. The USB2 receiver converts optical data coming from the DC amplifier into a USB2 output, which is connected to the data collection computer. The receiver also contains 16 independent trigger inputs and outputs, which allows for event markers for event-related potential experiments. Event information can be extracted during offline processing.
Stimulus Presentation
Stimuli for behavioral tasks are presented using Psychtoolbox (MATLAB) or E-Prime software. There are two 120Hz LCD BenQ monitors set up for stimulus display. One sits in the control room and the other in the subject testing room, which clones the display of the stimulus presentation computer in the control room. The stimulus computer is synchronized with the data acquisition computer and event marker, and there is an average 4ms delay between stimulus onset and stimulus display on the LCD monitor. For specifications on the monitors, data collection, and stimulus presentation computers, please contact the EEG Lab Manager.
EEG Record Recording Equipment
Our primary system is a BioSemi package, composed of 64-channel and 128-channel caps, pin and flat-type active electrodes, and battery-powered ActiveTwo DC amplifier. The ActiveTwo system records EEG at a sampling rate of 2048 Hz and applies a DC-400Hz bandwidth. ActiView software is used for data acquisition. The USB2 receiver converts optical data coming from the DC amplifier into a USB2 output, which is connected to the data collection computer. The receiver also contains 16 independent trigger inputs and outputs, which allows for event markers for event-related potential experiments. Event information can be extracted during offline processing.
Stimulus Presentation
Stimuli for behavioral tasks are presented using Psychtoolbox (MATLAB) or E-Prime software. There are two 120Hz LCD BenQ monitors set up for stimulus display. One sits in the control room and the other in the subject testing room, which clones the display of the stimulus presentation computer in the control room. The stimulus computer is synchronized with the data acquisition computer and event marker, and there is an average 4ms delay between stimulus onset and stimulus display on the LCD monitor. For specifications on the monitors, data collection, and stimulus presentation computers, please contact the EEG Lab Manager.
Data Analysis
Brain Products' Analyzer software, and EEGLAB, a toolbox for MATLAB, are currently used for data analysis. A Polhemus Fastrack apparatus can be used to create a three-dimensional montage of electrode locations unique to each subject. Users are also welcome to perform data analysis on their personal machines.
Lab Manager
Nick DePinto
ndepinto[at]princeton[dot]edu
609-258-9290