Rub-4-AP can be uncaged with either 1 photon excitation (λ = 480 nm) or 2-photon excitation (800 nm) (Nikolenko et al., 2005 (link); Fino et al., 2009 (link)). Uncaging was performed with 470 nm LED light (Figure 1A, Thorlabs, Newton, NJ) either broadly to the entire cortex or focally, delivered through an optical fiber (OD: 200 μm, Thorlabs, Newton, NJ), using a high power LED driver (LEDD1B, Thorlabs, Newton, NJ), controlled by a stimulator (Master-8; AMPI, Jerusalem, Israel). Optical power delivered at the fiber tip was calibrated with a PM100USB power meter (Thorlabs, Newton, NJ).
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