Vision Research Center


News from the VRC

VRC Administration

VRC Facilities

Related Penn Sites


Vision Science Seminar


UPenn - Vision Research Center Multi-Electrode Array (MEA)

Location: 124 Anat-Chem Bldg

New users, contact:

Diego Contreras, 121 Anat-Chem,, 215 898 8780

Sergei Nikonov, 117 Anat-Chem, 215 898 7536

The sign-up using the VRC Rig Room Booking System.

VRC high-density Microelectrode Array setup (Multi Channel Systems GmbH, Germany) allows simultaneous in vitro extracellular recording from multiple locations in the sample.

MEA Multi-electrode array

MEA setup includes:

  • Recording chamber with the electrode array
  • Perfusion system with temperature control and oxygenation capabilities
  • Recording system (low noise amplifiers and custom built data acquisition software)
  • Light stimulation system

MEA Layout: 

  • Number of recording fields: 2
  • Number of electrodes in a field: 30
  • Electrode layout: rectangular grid
  • Electrode diameter: 10 micrometer
  • Distance between electrodes: 30 micrometer
  • Internal reference electrode

Stimulation system:

  • full-field flashes at user-defined intervals
  • full-field flicker at a specified contrast
  • white noise checkerboards.

We also have the capability to present custom-generated monochromatic stimuli from a user-supplied MATLAB file.  Stimuli that we have used in the past include full-field flicker with values drawn from naturalistic distributions, correlated noise, and drifting bars.