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Lordosis behavior, also known as mammalian lordosis (Greek lordōsis, from lordos "bent backward") or presenting, is a body posture adopted by some mammals including humans, elephants, rodents, felines and others, usually associated with female receptivity to copulation. The primary characteristics of the behavior are a lowering of the forelimbs but with the rear limbs extended and hips raised, ventral arching of the spine and a raising, or sideward displacement, of the tail. During lordosis, the spine curves dorsoventrally so that its apex points towards the abdomen. In human physiology, the term "lordosis" is sometimes used to describe an abnormal forward curvature of the spine in the lumbar region.

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  • Lordosis behavior
  • ロードシス
  • Odruch lordozy
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  • Lordosis behavior, also known as mammalian lordosis (Greek lordōsis, from lordos "bent backward") or presenting, is a body posture adopted by some mammals including humans, elephants, rodents, felines and others, usually associated with female receptivity to copulation. The primary characteristics of the behavior are a lowering of the forelimbs but with the rear limbs extended and hips raised, ventral arching of the spine and a raising, or sideward displacement, of the tail. During lordosis, the spine curves dorsoventrally so that its apex points towards the abdomen. In human physiology, the term "lordosis" is sometimes used to describe an abnormal forward curvature of the spine in the lumbar region.
  • ロードシス(lordosis)はネズミやネコなどの哺乳類の雌の発情期における反射。触覚的刺激に対して、脊柱を背屈させる動作。 なお英語で単に「lordosis」と言った場合、脊柱前彎症を指す。 雌のハツカネズミでは発情期にエストロゲンの一種であるホルモン エストラジオールが視床下部腹内側核、中脳水道周囲灰白質他の神経細胞に作用する。臀部への刺激が腹内側視床下部を含む脳のいくつかの部分の活動の引き金となり、中脳水道周囲灰白質に繋がる軸索に信号を送る。これが脊髄網状体路と脊髄の(L1-L6)求心性ニューロンに伝わり、これが脊柱に付く筋肉を収縮させてロードシスの姿勢を作る。この求心性ニューロンが反射弓の一部であるため、これを反射とみることができる。
  • Odruch lordozy (łac. lordosis reflex) – odpowiedź ssaków (takich jak myszy bądź koty) na bodziec seksualny polegająca on na wygięciu kręgosłupa brzusznie. Wynikiem jest podniesienie bioder w celu ułatwienia kopulacji. Można go zwykle zaobserwować u samic podczas rui po stymulacji w postaci dotknięcia grzbietu.
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