my copy of mosby's medical, nursing, & allied health dictionary
, 6th edition, page 855, defines hypomania as "a mild degree of mania characterized by optimism; excitability; energetic, productive behavior; marked hyperactivity and talkativeness; heightened sexual interest; quick anger and irritability; and a decreased need for sleep. it may be observed before a full-blown manic episode."
hypermania is not a listing in this dictionary. however, under a listing for the suffix of -mania on page 1049 it states "a state of psychosis" and uses the word hypermania as an example for the use of the suffix. i would extrapolate from that information that hypermania would be a full blown case of psychotic mania.
a search on emedicine only yielded results for hypomania and not hypermania. this is what the docs had to say about it:
from "mood disorder: bipolar disorder" on emedicine website, (http://www.emedicine.com/ped/topic240.htm
"hypomania is somewhat similar to mania, but it is less severe and less debilitating than true mania. as such, hypomania is defined as an elevated mood during which (1) no hospitalization has ever been necessary, and (2) no state of delusional or other psychotic thinking ever coincided with the elevated mood. hypomanic and manic states must cause impairment of normal functioning to be considered pathologic states."
from "bipolar affective disorder" on emedicine website, (http://www.emedicine.com/med/topic229.htm
"hypomania may be thought of as a less severe form of mania that does not include psychotic symptoms or lead to major impairment of social or occupational function."
from that, again, i would have to assume the hypermania is a psychotic state of extreme excitability.
here is a listing of the mazmanian mania-depression mood scale that lists the symptoms under each category as you procede through each level from the highest level of mania to the lowest level of depression.