口服避孕药对安全环境的恐惧反应的持久影响
Lisa-Marie Davignon1,2, Alexandra Brouillard1,2, Marie-France Marin3,4
1Research Center of the Institut Universitaire en Santé Mentale de Montréal, Centre intégré universitaire de santé et de services sociaux de l'Est-de-l'Île-de-Montréal, 7331 Hochelaga Street, Montreal, QC, Canada.
概括
口服避孕药 (OC) 的使用,特别是高剂量,通过影响安全信号,损害了恐惧的调节. 即使停止使用OC,这些影响仍然存在,影响女性的情境恐惧记忆.
科学领域:
- 神经科学
- 内分泌学
- 心理学
背景情况:
- 雌激素 (E2) 影响恐惧调节,但其在人类上下文恐惧信号中的作用尚不清楚.
- 动物研究表明外源性E2可以将恐惧泛化为安全的环境.
- 之前的人类研究集中在与提示相关的恐惧, 而不是特定的恐惧记忆.
研究的目的:
- 研究荷尔蒙状况和口服避孕药 (OC) 如何影响人类的情境恐惧反应.
- 确定与OC相关的恐惧效应是否持久且依赖于剂量.
- 探索OC影响背景恐惧的神经相关性.
主要方法:
- 对147名健康参与者 (男性,骑自行车的女性,OC使用者) 进行了为期两天的恐惧调节和灭绝方案.
- 参与者在威胁背景下进行了调节 (CX+),在安全背景下进行了消灭 (CX-).
- 通过皮肤导电性和大脑活动 (海马和中腹前额皮层) 来测量恐惧回归.
主要成果:
- 与从未使用过的用户相比,目前和过去的OC用户对安全环境 (CX-) 的恐惧增加.
- 高剂量乙乙醇 (EE) 用户表现出较高的CX恐惧回归比从未使用者;低剂量使用者没有.
- 生物性别和内源性E2水平没有影响背景恐惧;海马和腹中前额皮层激活的减少与CX恐惧回归的增加相关.
结论:
- 口服避孕药的使用,特别是高剂量的EE,可能会影响从环境中获取安全信号.
- 这些对情境恐惧调节的影响可能会在OC停止后继续存在.
- 外源性激素,特别是OCs,是女性情境恐惧记忆的重要调节剂.
相关概念视频
Classical Conditioning in Daily Life
1.1K
Classical conditioning, a fundamental principle of associative learning, explains various phenomena observed in daily life, such as fear development, the placebo effect, taste aversion, and drug habituation. These applications demonstrate the profound impact of associative learning on human behavior and physiological responses.
John B. Watson and Rosalie Rayner famously demonstrated the development of fear through classical conditioning in their experiment with Little Albert. They paired the...
John B. Watson and Rosalie Rayner famously demonstrated the development of fear through classical conditioning in their experiment with Little Albert. They paired the...
1.1K
Preparedness and Phobias
148
Human fear responses to certain stimuli, such as darkness, heights, deep water, and blood, can often arise despite the absence of direct negative experiences. This phenomenon is rooted in evolutionary psychology, which posits that humans have developed a predisposition to fear stimuli that historically posed significant survival threats. This predisposition, known as preparedness, suggests that early humans who developed a fear of potentially dangerous entities, such as venomous snakes and...
148
Birth Control Methods
2.3K
Vasectomy is a surgical form of male sterilization that involves severing and sealing the vasa deferentia, preventing sperm from mixing with semen during ejaculation. Because a vasectomy does not impact the testes' ability to produce testosterone, hormone levels, libido, and sexual function generally remain unchanged. While vasectomy is highly effective in preventing pregnancy, with a success rate near 99.85%, rare cases of recanalization (spontaneous reconnection) can occur. Although...
2.3K
Desensitization and Tachyphylaxis
2.2K
Tachyphylaxis is described as a rapid decrease in response to a drug after repeated or continuous administration of the same drug dose. It is a phenomenon where the body becomes less responsive to a particular substance or intervention over time, requiring higher doses or stronger interventions to achieve the same effect. It results from adaptive changes in the body's receptors, signaling pathways, or physiological processes that occur in response to prolonged exposure to a stimulus.
2.2K
Classical Conditioning
658
Associative learning, a core principle in behavioral psychology, involves forming connections between events and facilitating learned responses. This concept is vividly illustrated by classical conditioning, a process extensively studied by the Russian physiologist Ivan Pavlov. Pavlov's pioneering research on dogs' digestive systems led to the discovery that behaviors can be learned through association, laying the groundwork for classical conditioning.
Ivan Pavlov observed that dogs...
Ivan Pavlov observed that dogs...
658
Traumatic Memory
173
Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual...
173


