The psi-splosion referred to when an entity possessing a large amount of mental energy experienced a sudden collapse as too much of the collected mental energy could not find release, turning into a mental energy dispersal that could be seen with the naked eye.
The command deck was filled with the energy fragments from this psi-splosion, and everything originated from the insectoid cerebrum that had survived for an unknown number of years. To be able to command a capital ship with just its mental energy, there was no doubt the insectoid cerebrum contained plenty of energy, and given the fact that it was made by the mysterious god race, the technological level should be extremely advanced, allowing it to stay alive all these years, absorbing plenty of mental energy.