MEG data were acquired using a 248-channel (or SQUIDs; superconducting quantum interference devices) whole head magnetometer (4D-Neuroimaging Magnes 3600 WH system) at the CCNi at the University of Glasgow, sampled at 508.63 Hz and band-pass filtered between 0.1 and 200 Hz. Trigger pulses via the parallel port were used to synchronize MEG data acquisition with experimental events. A Panasonic 3-chip DLP projector (PT-D7700E-K) was employed for visual stimulus presentation. Resolution was 1024 × 768 pixels covering a visual angle of 24° horizontal by 18° vertical. Each picture in the 3 × 3 matrices, employed during the interactive phases, covered a visual angle of 3.5° × 3.5°, whereas the single pictures presented during the testing phases covered 4.7° × 4.7°.
Pt d7700e k
Manufactured by Panasonic
Sourced in Japan
The PT-D7700E-K is a high-performance laser projector designed for professional use in various settings. It features a 7,000 lumens brightness and a 1920 x 1200 resolution, making it suitable for large-scale presentations, conferences, and other demanding applications. The projector is equipped with advanced connectivity options, including HDMI, DVI-D, and SDI inputs, allowing for seamless integration with various media sources.
Automatically generated - may contain errors
Lab products found in correlation
2 protocols using pt d7700e k
1
Magnetoencephalography Protocol for Visual Experiments
2
Visual Motion Coherence Discrimination Task in MEG
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The resting-state block lasted 5 minutes during which participants kept their eyes open while staring at a black screen. Participants could mindwander freely. 5 minutes were selected to be sufficient for an accurate estimation of scale-free properties but not long enough for participants' cognitive state to drastically change. Resting-state activity was recorded prior to any exposure to task or stimuli. The task block lasted 12 minutes during which participants performed a visual motion coherence discrimination task [46] . In each trial (2.5 s), participants decided which of two intermixed (green and red) clouds of dots was most coherent. Responses were delivered by button press. The experiment was conducted in a darkened soundproof magneticshielded room. Participants were seated in upright position under the MEG dewar facing a projection screen placed 90 cm away. The refresh rate of the projector (model PT-D7700E-K, Panasonic Inc, Kadoma, Japan) was 60 Hz. Participants were explained the task and were in contact at all times with the experimenter via a microphone and a video camera. Stimuli were designed using Matlab (R2010a, Mathworks Inc.) with Psychtoolbox-3 [47] on a PC (Windows XP).
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