Ok the docs said that i have damage to parts of my brain but it didnt show on scans. They found it from an evaluation where they put me through some memory, dexderity, and speed tests. Is this right? Can they say that i have this damage without it showing on the eeg, mri with/without contrast, cat scan, and think there was some other test they did but not sure. Can someone have brain damage and it just not show up?