arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0707.4487q-bio.NC
收藏

2D活体神经网络的领导地位

Leadership in 2D living neural networks

Jean-Pierre Eckmann, Shimshon Jacobi, Shimon Marom, Elisha Moses, Cyrille Zbinden

摘要:

Eytan和Marom最近表明,大鼠神经元培养物的自发爆发活动包括“首先放电”的细胞,这些细胞始终比其他细胞更早放电。在这里,我们分析了这些神经元的行为,在长期记录的自发活动的大鼠海马和大鼠皮层神经元培养物从三个不同的实验室。我们确定的前兆事件,可能会消退(“小事件”)或可能导致一个全面爆发(“预爆发”)。我们发现,在预爆发的激活通常有第一个神经元(“领导者”),其次是在其附近的本地化响应。局部性在爆发本身中减弱。领导者的长期动态相对稳健,半衰期为23-34小时。文化的刺激可以暂时改变领导者的分布,但它在大约1小时内恢复到以前的分布。我们表明,领导人携带信息的身份的突发,测量的签名的数量尖峰每个神经元在一个突发。此外,在前兆事件的前几个尖峰中来自领导者的尖峰的数量被示出为关于到突发的过渡(突发前与小事件)是预测性的。我们的结论是,领导人发挥了作用的发展的爆发,并推测他们是一个潜在的子网络的一部分,首先被激发,然后作为成核中心的爆发。

英文摘要:

Eytan and Marom recently showed that the spontaneous burst activity of rat neuron cultures includes `first to fire' cells that consistently fire earlier than others. Here we analyze the behavior of these neurons in long term recordings of spontaneous activity of rat hippocampal and rat cortical neuron cultures from three different laboratories. We identify precursor events that may either subside (`small events') or can lead to a full-blown burst (`pre-bursts'). We find that the activation in the pre-burst typically has a first neuron (`leader'), followed by a localized response in its neighborhood. Locality is diminished in the bursts themselves. The long term dynamics of the leaders is relatively robust, evolving with a half-life of 23-34 hours. Stimulation of the culture can temporarily alter the leader distribution, but it returns to the previous distribution within about 1 hour. We show that the leaders carry information about the identity of the burst, as measured by the signature of the number of spikes per neuron in a burst. The number of spikes from leaders in the first few spikes of a precursor event is furthermore shown to be predictive with regard to the transition into a burst (pre-burst versus small event). We conclude that the leaders play a rôle in the development of the bursts, and conjecture that they are part of an underlying sub-network that is excited first and then act as nucleation centers for the burst.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑