Data by E. A. Blair and Erlanger on the voltage-capacity curves and the nerve impulse velocities of each of several fibres in the same nerve trunk are related to Rashevsky's equation for the velocity of transmission in nerve. The results lend support to Rashevsky's analysis. Other empirical relations between the velocity and the parameters of the excitation equations indicate the correctness of...

The inverse approach from MR images to electrical propagation is very novel, but difficult due to complicated processes from electrical excitation to heart contraction. A novel strategy is presented to recover cardiac electrical excitation pattern from medical image sequences and ECG data. We used MRI images to estimate the current density and visualize it on the surface of the heart model. The...

• Electrical depolarization of the muscle cell membrane lias been generally considered to be an essential part of the physiological excitation of muscle cells which initiates contraction." However, there is direct evidence for electrical inexcitability of the membrane receptors in frog skeletal muscle, and complete depolarization by immersion in isosmotic potassium-rich solution does not abolis...

We introduce a model for the electrical behavior of brain cells, based on a model introduced in [8]. This model basically makes analogies between electrical circuits and the way the body and synapse of brain cells work. Numerical simulation is implemented seeking for synchronization; what the numerical results show is synchronization in case of little, strong interaction (excitation), strong in...

Electrical impedance tomography (EIT) is a non-invasive technique that aims to reconstruct images of internal electrical properties of a domain, based on electrical measurements on the periphery. Improvements in instrumentation and numerical modeling have led to three-dimensional (3D) imaging. The availability of 3D modeling and imaging raises the question of identifying the best possible excit...

A three dimensional model of a myocardial area is presented, which allows the simulation of electrical excitation propagation under the influence of stretch. The model is based on a modified Noble-Varghese-Kohl-Noble model of a ventricular cell. The simulation of the propagation of electrical excitation via intercellular current flow is performed by the traditional and an extended bidomain mode...

Propagation of excitation in the heart involves action potential (AP) generation by cardiac cells and its propagation in the multicellular tissue. AP conduction is the outcome of complex interactions between cellular electrical activity, electrical cell-to-cell communication, and the cardiac tissue structure. As shown in this review, strong interactions occur among these determinants of electri...

The excessive electrical activity of neurons is reported in many diseases including: Parkinson's disease, Alzheimer's disease, and Epilepsy. Electrical overactivity in hippocampus accelerates the depletion of neural stem cell (NSC) and impairs the neurogenesis in hippocampus. It is believed that neurogenesis in hippocampus improves the cognitive functions. In this experiment, we use kindled mod...