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1964•The Keio Journal of MedicineOpen access

STUDIES ON ELECTROPHYSIOLOGICAL PROPERTIES OF VAGO-VAGAL REFLEX

Eiichi Sugaya, Tadayoshi Akiba, Masaharu Tsuchiya, YASUYOSHI KIRYU, Mitsuya Yasuda, Yoichi Yamaguchi, Yasuo Fujishiro

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Abstract

1. Electrical reflex response of vago-vagal reflex was studied by stimulating the cervical vagus nerve of the right side and recording from the cervical vagus nerve of the left side.2. The electrical response of vago-vagal reflex can be grossely divided into three groups: constant 5-10 msec, latency response, labile 20-30 msec, and 60-90 msec. latency responses.3. These reflex responses are abolished by myanesin.4. Strychnine augments this reflex response and evokes the spontaneous burst-like discharge in higher doses.5. The responsible afferent fibers of reflex response are probably the B and delta fibers.6. Systemic cooling evokes the remarkable augmentation of vago-vagal reflex response.7. Mechanism of “Irritation syndrome” is discussed in connection with these observations.

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1. Electrical reflex response of vago-vagal reflex was studied by stimulating the cervical vagus nerve of the right side and recording from the cervical vagus nerve of the left side.2. The electrical response of vago-vagal reflex can be grossely divided into three groups: constant 5-10 msec, latency response, labile 20-30 msec, and 60-90 msec. latency responses.3. These reflex responses are abolished by myanesin.4. Strychnine augments this reflex response and evokes the spontaneous burst-like discharge in higher doses.5. The responsible afferent fibers of reflex response are probably the B and delta fibers.6. Systemic cooling evokes the remarkable augmentation of vago-vagal reflex response.7. Mechanism of “Irritation syndrome” is discussed in connection with these observations.

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Available abstract

1. Electrical reflex response of vago-vagal reflex was studied by stimulating the cervical vagus nerve of the right side and recording from the cervical vagus nerve of the left side.2. The electrical response of vago-vagal reflex can be grossely divided into three groups: constant 5-10 msec, latency response, labile 20-30 msec, and 60-90 msec. latency responses.3. These reflex responses are abolished by myanesin.4. Strychnine augments this reflex response and evokes the spontaneous burst-like discharge in higher doses.5. The responsible afferent fibers of reflex response are probably the B and delta fibers.6. Systemic cooling evokes the remarkable augmentation of vago-vagal reflex response.7. Mechanism of “Irritation syndrome” is discussed in connection with these observations.

Key concepts: Oculocardiac reflex, Reflex, Vagovagal reflex, Vagus nerve, Anesthesia, Medicine, Electrophysiology, Afferent

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