…This is a flexion reflex, in which when one leg is bent, the other leg extends to support the body weight and maintain balance. Reflexes that affect the skeletal muscles of the entire body include the tonic labyrinth reflex and the tonic neck reflex. In the tonic neck reflex, when the neck is twisted, the upper and lower limbs on the side facing the face extend, and the upper and lower limbs on the opposite side flex. … From [Reflection]…Reflexes with a reflex center from the medulla oblongata to the midbrain include the vestibulo-ocular reflex, which moves the eyes in the opposite direction when the head moves, and the optokinetic reflex, which moves the eyes in response to changes in the visual field. Well-known reflexes with a reflex center from the medulla oblongata to the spinal cord include the tonic labyrinth reflex and the tonic neck reflex. The former acts on the neck muscles to automatically keep the head in a constant position in response to changes in head position, and acts on the limbs and trunk to maintain balance in the body posture. … *Some of the terminology that refers to "tonic neck reflex" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…これは屈曲反射で,一側の下肢が屈曲したとき,対側の下肢が伸展して体重を支え,身体の平衡を保つものである。全身の骨格筋に及ぶ反射として緊張性迷路反射と緊張性頸反射がある。緊張性頸反射では,首をねじると顔の向いた側の上下肢が伸展し,反対側の上下肢が屈曲する。… 【反射】より…延髄から中脳にかけて反射中枢のあるものとしては,頭が動いたときこれと反対方向に目を動かす前庭動眼反射や,視野の動きにつれて目を動かす視機性眼球運動がある。延髄から脊髄にかけて中枢のある反射としてよく知られているものに,緊張性迷路反射と緊張性頸反射がある。前者は頭の位置の変化に応じて,頸筋に作用して頭の位置を自動的に一定に保ったり,四肢や体幹に働いて身体の姿勢の平衡を保つように働く。… ※「緊張性頸反射」について言及している用語解説の一部を掲載しています。 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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