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Trigeminocardiac reflex: the current clinical and physiological knowledge.

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The trigeminocardiac reflex (TCR) involves sudden changes in heart rhythm and blood pressure when stimulating the trigeminal nerve. This review examines the mechanisms and diverse nature of this important brainstem reflex.

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Area of Science:

  • Neuroscience
  • Physiology
  • Surgical Anesthesia

Background:

  • The trigeminocardiac reflex (TCR) is a brainstem reflex triggered by stimulation of the trigeminal nerve.
  • It manifests as parasympathetic dysrhythmia, sympathetic hypotension, apnea, or gastric hypermotility.
  • TCR is frequently observed during surgical procedures involving trigeminal nerve-innervated structures.

Purpose of the Study:

  • To provide an updated examination of the trigeminocardiac reflex (TCR).
  • To focus on the underlying mechanisms and diverse manifestations of TCR.
  • To address the need for clarification regarding TCR's physiological significance and function.

Main Methods:

  • Literature review.
  • Analysis of existing research on TCR incidences and risk factors.
  • Examination of cellular mechanisms and functional consequences.

Main Results:

  • Abundant literature exists on TCR incidences and risk factors.
  • The physiological significance and function of TCR remain not fully elucidated.
  • Complexities within TCR require further examination and clarification.

Conclusions:

  • The current review synthesizes existing knowledge on TCR.
  • It highlights the need for deeper understanding of TCR's mechanisms and functional role.
  • Further research is needed to fully elucidate the physiological significance of this reflex.