Does "everything shut off" mean "(the worm) shut himself off everything else (and concentrated...)"?

Does "everything shut off" mean "(the worm) shut himself off everything else (and concentrated himself on eating the food (decomposing matter)"?

Context:

By recording the activity of these neurons, Gordus and colleagues found that there were three persistent states among the three neurons: All were off, all were on, or only one, called AIB, was on. If all were off, then, when the odor signal arrived, they stayed off. If all were on, they often, but not always, shut off. And, in the third and most telling scenario, if AIB alone was active when the odor arrived, everything shut off. "This means that for AIB, context matters. If it's on alone, its activity will drop when odor is added, but if it's on with the rest of the network, it has difficulty dropping its activity with the others," Gordus says.

More:
http://www.sciencedaily.com/releases/2015/03/150313110402.htm