刺激在嗅觉可塑性中的作用
David M Coppola1, Johannes Reisert2
1Biology Department, Randolph-Macon College, Ashland, VA 23005, USA.
Brain sciences
|November 25, 2023
概括
大脑的可塑性允许神经系统随着经验而改变. 本综述研究了感官剥夺和丰富如何影响哺乳动物的嗅觉可塑性,突出了取决于活动的变化和补偿机制.
科学领域:
- 神经科学是一个神经科学.
- 感官生物学 感官生物学
- 神经可塑性 神经可塑性
背景情况:
- 大脑的可塑性是神经系统随着经验而改变的能力,这是一个关键的进化适应.
- 嗅觉是一种独特的感官系统,不断供应新的神经元,使其成为研究可塑性的首要模型.
- 近几十年来,技术的进步大大推动了对大脑可塑性的科学研究.
研究的目的:
- 审查古典和当代关于刺激存在或缺失在嗅觉可塑性中的作用的文献.
- 专注于使用刺激剥夺 (主要是单边鼻封闭) 和刺激丰富的哺乳动物研究.
- 讨论这些操纵对理解嗅觉系统功能和适应的影响.
主要方法:
- 专注于刺激剥夺的科学文献的综述,特别是哺乳动物中单边的鼻闭塞.
- 在嗅觉系统中使用感官丰富范式的研究分析.
- 检查嗅觉系统的多个层面的研究,从感觉神经元到皮质区域.
主要成果:
- 刺激剥夺提供了实质性的证据,证明在发育和成年哺乳动物中存在活动依赖的过程.
- 剥夺研究揭示了旨在恢复信息流的补偿机制,尽管感官输入减少了.
- 感官丰富研究表明,即使是被动的气味暴露也可以增强嗅觉皮质功能,用于检测,歧视和记忆编码.
结论:
- 嗅觉可塑性受到感官刺激的存在和缺乏的显著影响.
- 活动依赖的过程和补偿机制对于塑造嗅觉系统对体验的反应至关重要.
- 需要进一步的研究来标准化感官丰富协议,以便在嗅觉可塑性研究中获得更一致和可解释的结果.
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