Figure 3.

Glissandi are light-vulnerable. A, The relationship between the mean frequency of sporadic activities and the light intensity of the laser used for imaging. The activities increased with the laser intensity, and glissandi occurred only at the weakest laser intensities (shaded zone). Error bars indicate SD. B, Preparations that exhibited glissandi had lower frequencies of sporadic activity compared with those that did not demonstrate glissandi. Data are a compilation of 72 movies (35 mice; laser intensity, 8–30 mV).