demo final torok
TRANSCRIPT
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HOW WE NAVIGATE IN SPACE
Cognitive map (Tollman, 1948)
The Nobel Prize in Physiology or Medicine 2014 John O’Keefe, May-Britt and Edvard I. Moser - "for their discoveries of
cells that constitute a positioning system in the brain„
So far what we know is mostly based on animal experiments Place cells (O’Keefe & Dostrovsky, 1971) Grid cells (Hafting, Fyhn, Molden, M. B. Moser & E. Moser, 2005) Head direction cells (Taube, Muller, Ranck, 1990)
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WINDOWS INTO THE BRAIN
Several methods to measure neurak activity directly … ECoG Deep brain electrodes EEG MEG
And indirectly fMRI PET, SPECT NIRS
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NECESSITY OF TOOLS
Measure brain activity during Active motion In a 3 dimensional space
Recent advancement Portable EEG devices CAVE and HMD systems (Oculus Rift) Motion tracking Online realistic graphical rendering Communication between neuroscientists and
computer scientists
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HOW CAN WE SET UP AN EXPERIMENT
T-maze experiment Do they prefer one alley? Are the fruits associated with one alley?
Talk Define the experiment Define the terms Define the key features
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IMPLEMENTATION
VirCA + Experiment Controller Experiments presented in Collaborative virtual environment
Following methodology of psychological experiments Experiment description provided in XML language
Standard, general descriptor Schema support: validate Experiment descriptor schemantically
Provide features for analysis and synchronization Logging Triggering via Parallel Port Rewarding system
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METHODOLOGYExperiment Definition part and schedule part Scene description
State of virtual environment for experiment
Stimuli Including visual objects Complete visual impact
Events Including stimuli Conditions and effects of stimuli
Scenario Schedule of events Conditions
time or user initiative (key press)
T-Maze Experiment Descriptor Movements depends on user choice
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LET’S SEE HOW THAT WORKS !