在老鼠新皮质中,对柱状突触增强需要跨层同步的神经活动
John Vargas-Ortiz1, Lin Lin1, Vena K Martinez1
1Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA.
Nature communications
|February 3, 2025
概括
5层神经元同步发展小鼠皮质活动. 沉默这些输入减少了自发和感官唤起的活动,突出了它们在皮质发育和连接中的关键作用.
科学领域:
- 神经科学是一个神经科学.
- 发育神经科学的发展神经科学.
- 皮层发育 皮层发育
背景情况:
- 同步的神经元活动在发育中的大脑中至关重要.
- 鼠标体感皮质中的二三层活动得到了充分的证据,但其来源仍然不清楚.
研究的目的:
- 在发育的皮质层中确定同步神经元活动的来源 2/3.3.
- 为了研究5层输入在同步桶柱活动中的作用.
主要方法:
- 在新生小鼠体内使用新型微镜制剂进行2光子成像.
- 单突触狂犬病追踪和切片电生理学.
- 沉默实验的目标是第5层的突触输出.
主要成果:
- 同步的神经元活动在桶柱内跨层组织.
- 层2/3的金字塔神经元在发育早期从5层神经元接收大量输入.
- 5层沉默显著减少了自发活动,改变了感官唤起的反应,并破坏了4层-2/3层连接.
结论:
- 跨层层5到层2/3的连接对于同步开发的桶柱至关重要.
- 这种连接性确保了层4层2/3连接的加强,支持正规皮质组织.
相关概念视频
01:33Somatosensation
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
01:13Cell-matrix's Response to Mechanical Forces
In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue.
Anchoring junctions mechanically attach a cell to the...
Anchoring junctions mechanically attach a cell to the...