Open brain Q

[JTrigger]

I've had a small open brain for 5 months now... and it's been doing pretty well, but in the last few months I've noticed at night it seems the inner section gets really large and almost dominates the brain at night when the lights are off and polyp-like extensions come out and the brain gets very spongy... it's just a pretty excessive transformation.. just wondering if this is totally normal

JT