hyperexcitation

As nouns the difference between overstimulation and hyperexcitation

is that overstimulation is excessive stimulation while hyperexcitation is an excessive excitation; overstimulation.

As nouns the difference between excitation and hyperexcitation

is that excitation is the act of exciting or putting in motion; the act of rousing up or awakening while hyperexcitation is an excessive excitation; overstimulation.