Sofia Gutkin (asker) Jan 22, 2013:

Thank you for your help Well, I ended up using the term "cerebro-asthenic" since I didn't know what else to use. Thank you Jack and Nevaeva for providing references, they assuaged my fears somewhat.

Jack slep Jan 21, 2013:

You can also find its definition in volume 3 of the Russian "Encyclopedic Dictionary of Medical Terms," Izd. Sovet. Entsiklopedia, Moscow, 1984.

Jack slep Jan 21, 2013:

Better tell these authors they're using words that don't exist.
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by CL McGuire - 2008
Cerebrasthenia, or brain exhaustion, was the most similar to Beard's original definition in that it was principally applied to professional men experiencing a lack ...
Posttraumatic cerebrasthenia and posttraumatic encephalopathy ...
pesquisa.bvsalud.org/portal/.../pt/mdl-21520540 - Translate this page
A Biblioteca Virtual em Saúde é uma colecao de fontes de informacao científica e técnica em saúde organizada e armazenada em formato eletrônico nos ...

Jack slep Jan 21, 2013:

You're right, Yurizx, "astenic" is backward.

Jurate Kazlauskaite Jan 21, 2013:

Reference for "Cerebral asthenia" (or brain fag) http://www.njhonline.com/1993/july_aug_93_vol_11_no_4/mm/ave...

Yuri Radcev Jan 21, 2013:

there is no such a diagnosis, or condition as "cerebral astenic". it is backwardness of the russian medicine that "shines through"...
sorry.

Jack slep Jan 21, 2013:

As Jurate and Navaeva point out, the term does exist as indicated in the references. Because it's not "English" doesn't mean there is no such thing. New words are "invented" daily. We now have commonly used Russian words such as sputnik, cosmonaut, and Vernadsky's noosphere. And in the fields of soil science and ecology, most words are of Russian origin. Don't be afraid to use new words...

Jurate Kazlauskaite Jan 20, 2013:

e.g. "cases of cerebroasthenic syndrome" http://books.google.lt/books?id=DnUSLjzYWJkC&pg=PA25&lpg=PA2...