The more modern term would be bipolar, which is a disorder that causes people to alternate between two extremes in their emotional state (sometimes referred to as poles).
Another term for this is Manic-Depressive, where the feeling of extreme happiness is the manic state, and the extreme sadness is considered depressive.
Cycling between mania and depression is pretty classic for Bipolar disorder, but there are some others that mat fit as well.
manic depression
It means a person alternates between extreme "highs" and exterme "low" Manic = overconfident, reckless, .......
Extreme happiness
Yes
Being bipolar means that you have extreme mood swings between depression and happiness.
bliss- (a state of extreme happiness)..........(R Salim)
The answer for take 5 WIN a stero system puzzel for extreme happiness is CLOUDNINE
overjoyed Euphoria Ecstatic
Extreme hypothermia
Bradykinesia is the condition of extreme slowness in movementBradykinesia
Extreme happyness
Extreme happiness and excitement for no apparent reason.
That is the correct spelling of "jubilance" (extreme happiness, delight).