Medical Dictionary

trigger zone

noun

medical Definition of trigger zone

1 : trigger point
  • After identifying and manually stabilizing the tender area in the taut band with the fingers, the needle is quickly passed through the skin and then into the trigger zone.
  • —Robert D. Gerwin and Jan Dommerholt, in Pain Management: A Practical Guide for Clinicians, 6th edition2002
2 : chemoreceptor trigger zone
  • Emesis experts believe that poisons somehow signal a chemical trigger zone, possibly in a region of the brainstem called the area postrema …
  • —Tom SiegfriedThe Dallas Morning News7 July 1997
3 : the site on an axon where action potentials are initiated that typically occupies the same region as the axon hillock
  • The signal is passively transmitted along the neuron until it reaches the trigger zone where action potentials are generated …
  • —Frank J. Cerney and Harold W. BurtonExercise Physiology for Healthcare Professionals2001

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