I must have missed this one when it first came out, because I only noticed it a few days ago and had the time to sit down and read it now. I'm really glad you 'picked this up' again, because it really shows the kind of problems that could result from experimental implants and messing around with the huma(oid) brain. As much as Zark likes to white-wash everything, that's a difficult area and it's not surprising that there would be test problems or unseen consequences for the initial test subjects. 

A very interesting read!