If you run around the bottom floor here before heading up any of the ramps you'll find a Psi-Card. In this area you can hear a kid crying, so to find him go back to where you came in and go up the ramp straight in front of you, turn left and go up the first ramp on your right, and punch the door on the big round silver thing there. You'll then get a scene with the kid who was crying and be back at the bottom.
Now go back up to that same silver thing and you'll notice that it's got a bunch of "spikes" protruding from it, use these to get on top of it to get a Psi-Card. Now go in the chamber where the kid was, a button is missing Raz points out. Well if you remember, Sasha gave you a button after you got out of Basic Braining you can pull out of your Backpack and press 'Y' by where the button is missing to open the door to Sasha's lab.