hyperphrenia

hy·per·phre·ni·a

(hī'pĕr-frē'nē-ă),
Rarely used term for an excessive degree of intellectual activity; a form of mania.
[hyper- + G. phrēn, mind]

hyperphrenia

(hī″pĕr-frē′nē-ă) [Gr. hyper, over, above, excessive, + phren, mind]
1. Excessive mental activity, seen in the manic phase of manic-depressive psychosis.
2. Mental ability and capacity much greater than normal.