Keywords beta-endorphin;thyrotropin-releasing hormone;naloxone;hypoxia;median eminence;paraventricular hypothalamic nucleus;intraventricular injections;

• 内啡肽;促甲状腺素释放激素;纳洛酮;低氧;正中隆起;下丘脑室旁核;脑室内注射;