To spring back (e.g., to recover from an illness). N. sudden contraction of a muscle following relaxation, occurring in cases where inhibitory reflexes are disturbed.
A reflex response in which sudden withdrawal of a stimulus is followed by increased activity, such as an increase in heart rate or blood pressure when beta-blocking drugs or clonidine are withheld.
A sudden tightening of a muscle after it has eased up and without being prompted by another stimulus.