from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Excessive response to a stimulus.
Sorry, no etymologies found.
They have racing thoughts, hyperirritability and agitation.
Considerations of Basic Mechanisms True benign Rolandic epilepsy is likely to be based on temporary paroxysmal hyperirritability of the motor cortex, which naturally has a lower threshold of epileptic excitability.