To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 pH fluctuations upon high frequency stimulationNeurons were imaged by time-lapse fluorescence microscopy, at λex = 405 nm (1 image/2.58 s, total time: 350 s, movie played at 29 frames/s) under high frequency electrical stimulation (1200 AP, 10 Hz). Neuronal hyperactivity causes Na+/H+ exchanger-induced extracellular acidification at active synapses Martina Chiacchiaretta, Shahrzad Latifi, Mattia Bramini, Manuela Fadda, Anna Fassio, Fabio Benfenati, and Fabrizia Cesca J Cell Sci 2017. 130:1435-1449; doi: 10.1242/jcs.198564 Download Original Video