N-甲基-d-酸盐受体的低功能的原因是感知推理的反复和短暂的失败
Veith Weilnhammer1,2,3, Marcus Rothkirch1,4, Deniz Yilmaz1,5,6,7
1Department of Psychiatry and Neurosciences, Charité-Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin 10117, Germany.
Brain : a journal of neurology
|January 17, 2025
概括
作为N-甲基-D-酸盐受体 (NMDAR) 反对者,S-胺转移了对外感官输入的感知. 这种依赖于NMDAR的效应可能会解释精神分裂症的症状是与先前知识的分离.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 精神病学是一个精神病学.
背景情况:
- 感知涉及整合外部感官数据与基于先前知识的内部预测.
- 这种整合可以在外部和内部模式之间交替进行,由感官信号和先前知识影响.
- N-甲基-D-酸盐受体 (NMDARs) 在突触可塑性和神经传递中发挥着至关重要的作用.
研究的目的:
- 调查NMDAR对抗剂S-胺对外部和内部感知模式之间的平衡的影响.
- 探索NMDAR功能,感知模式和偏执精神分裂症症状之间的潜在联系.
主要方法:
- 在健康的人类参与者身上进行了一项双盲,安慰剂控制,交叉实验.
- 这项研究采用了病例对照设计,将健康个体与被诊断患有偏执精神分裂症的个体进行比较.
- 在不同的条件下,行为测量评估了外部和内部感知模式之间的平衡.
主要成果:
- 在健康的参与者中,施用S-胺诱导了对外部模式的感知显著转变.
- 患有偏执性精神分裂症的个体,以NMDAR低功能的特征,表现出与外部感知模式的长期接触.
- 观察到NMDAR功能与外部感知模式的主导性之间的相关性.
结论:
- NMDAR活动调节了外部感官处理和感知中的内部预测建模之间的平衡.
- 这些发现表明,精神分裂症中NMDAR低功率导致过度强调外部输入,使知觉与先前知识分离.
- 这种感知偏差可能是偏执性精神分裂症的特征症状的基础,例如妄想和幻觉.
相关概念视频
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Long-term Potentiation
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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