The Collaborative International Dictionary of English v.0.48:

Cerebropathy \Cer`e*brop"a*thy\, n. [Cerebrum + Gr. ?
   suffering.] (Med.)
   A hypochondriacal condition verging upon insanity, occurring
   in those whose brains have been unduly taxed; -- called also
   brain fag.
   [1913 Webster]