Movie 10

Optogenetically induced muscle contractions Single plane spinning disc confocal movies of myotubes labelled with Mef2-GAL4, UAS-GFP-Gma and UAS-Channelrhodopsin at 46 h (upper movie), 50 h (middle) and 52 h APF (lower movie). Ca²⁺ influx is induced while imaging with 488 nm laser light and induces a small contraction at 46 h APF and strong contractions at 50 h and 52 h APF. Time is indicated in seconds. Movies plays with 10 frames per second.