Before revision:  In contrast to prior work, our results show that complexity differences can emerge at very short time scales and across broad regions of the fly brain  , thus heralding the macroscopic state of anaesthesia in a previously unforeseen manner  .
After revision:  In contrast to prior work, our results show that complexity differences can emerge at very short time scales and across broad regions of the fly brain , thus heralding the macroscopic state of anaesthesia in a previously unforeseen manner . Furthering the links between physics, complexity science and neuroscience promotes the understanding of the physical basis that supports the level of conscious arousal in URLanisms .