Vasomotor center - kekkanundouchuu (English spelling) vasomotor center

Japanese: 血管運動中枢 - けっかんうんどうちゅうすう（英語表記）vasomotor center

Part of the circulatory center (cardio-vasomotor center) that regulates the movement of the heart and blood vessels. It is located in the medullary reticular formation, which is distributed from the lower part of the pons in the brainstem to the upper part of the medulla oblongata, and sends impulse signals to the contractile sympathetic nerves that control the blood vessels throughout the body, constantly controlling the tone and contractility of the blood vessels. Therefore, if this center is destroyed, the activity of most of the contractile sympathetic nerves disappears, causing a decrease in vascular tone and dilation, resulting in low blood pressure. The internal structure of the center has not been fully elucidated, but it is functionally divided into two areas, one that increases blood pressure and one that decreases blood pressure, based on the effects of electrical stimulation.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

心臓や血管の運動調節にあずかる循環中枢(心･血管運動中枢)の一部。脳幹の橋の下部から延髄上部に分布する延髄網様体に存在し，全身の血管を支配している収縮性交感神経へインパルス信号を送り，常時血管の緊張性や収縮性を制御している。したがって，この中枢が破壊されると，大部分の収縮性交感神経の活動が消失し，血管の緊張性の低下と拡張により低血圧が発生する。中枢の内部構造はよく解明されていないが，電気刺激の効果から機能的に昇圧と減圧の二つの領域に大別される。

出典　株式会社平凡社世界大百科事典第２版について　情報

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