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Optogenetic photoactivation of lumbosacral cord motor neurons. An uninfected ChAT-mhChR2-YFP transgenic mouse was implanted with a cannula mount. A fiber optic was inserted into the cannula mount and pulsed with blue-light to activate the neurons containing the ChR2. Red color indicates the photoactivation signal. Blue color indicates the EMG signal of the gastrocnemius muscle.
