Spiking patterns of a hippocampus model in electric fields

• Published in: Chinese physics B Vol. 20; no. 12; pp. 484 - 489
• Main Author: 门聪 王江 秦迎梅 魏熙乐 车艳秋 邓斌
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.12.2011
• Subjects: Amplitudes; Bursting; Direct current; Electric fields; Firing; Hippocampus; Mathematical models; Neurons; Strategy; 型模; 放电模式; 数值模拟; 海马; 电场强度; 电阻阵列; 神经元; 神经系统疾病
• ISSN: 1674-1056; 2058-3834; 1741-4199
• DOI: 10.1088/1674-1056/20/12/128704

We develop a model of CA3 neurons embedded in a resistive array to mimic the effects of electric fields from a new perspective. Effects of DC and sinusoidal electric fields on firing patterns in CA3 neurons are investigated in this study. The firing patterns can be switched from no firing pattern to burst or from burst to fast periodic firing pattern with the increase of DC electric field intensity. It is also found that the firing activities are sensitive to the frequency and amplitude of the sinusoidal electric field. Different phase-locking states and chaotic firing regions are observed in the parameter space of frequency and amplitude. These findings are qualitatively in accordance with the results of relevant experimental and numerical studies. It is implied that the external or endogenous electric field can modulate the neural code in the brain. Furthermore, it is helpful to develop control strategies based on electric fields to control neural diseases such as epilepsy.