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gating (gāt´ing)   controlling access or passage through gates or channels.
  selection of electrical signals by a gate, which passes signals only when a control signal (the gate pulse) is present, or passes only signals with certain characteristics, such as a pulse height.
  substrate-binding– or ligand-binding–induced opening and closing of a biologic membrane channel, believed to be due to conformational changes in proteins lining the channels.
  sensory gating.
 

cardiac gating  selective acquisition of cardiac function information at specific points in the cardiac cycle by using information from the electrocardiographic signal to time the cardiac cycle and control image sampling. It has been used in digital subtraction angiography, computed tomography, nuclear cardiology, and magnetic resonance imaging.

sensory gating  inhibition or blocking of incoming sensory stimuli or channels when attention is occupied by another channel or stimulus.





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