I'm REALLY glad the MRI came back OK!
But an EEG is still a really good idea, just to be certain. I'm surprised they didn't do it at the same time as the MRI, to be honest--it's very simple and compared to an MRI, inexpensive! Basically, what they do is use a watersoluble glue to attach little electrodes onto the skull, and they trace the elecrical activity that's happening in different areas of the brain. It's totally non-invasive and much less stressful than the MRI she's already had.
Keep a really close eye on her, and if you have any sense at all that she's still having any effects at all, insist on the neurology referral and the EEG.
Yes: after my dad working in a hospital for 30 years, plus paying for my college education working as a medical records clerk, I'm totally paranoid about everything to do with doctors and hospitals. Always take the next test, that's whay I say!