[1] Windows 95/98/NT version of Gabori Attack, a contrast
sensitivity test program presented as a computer game.
The Macintosh version is also available as previously
announced.
[2] Real-time Visual Neuron Simulator (VNS) - Mac version.
VNS allows you to explore receptive fields (RF) of visual
neurons as if you are a neurophysiologist trying to locate
and map the RF.
Conventional bar-shaped stimuli, drifting sinusoidal
gratings, and reverse correlation mapping stimuli are
available. You may drag a stimulus across the RF, or
control stimulus parameters using the mouse.
Space-time receptive field data from three simple cells
in the primary visual cortex (area 17) of the cat are
built-in. In addition, you may manually draw a desired
RF map and examine how a cell with that receptive field
might respond.
The program performs real-time computations of neural
responses as you manipulate stimuli based on a RF model,
and displays post-synaptic membrane potential as well
as spike discharge rate. Spike discharges are generated
via the audio output.
No further announcement will be made regarding these programs, so
if you are interested in updates or in the Windows version of VNS,
please check the web site occasionally.
Izumi Ohzawa and Matthew Peterson
University of California, Berkeley
vns@pinoko.berkeley.edu