OBJECTIVE Chronic neural recording in behaving animals is an essential method for studies of neural circuit function. However, stable recordings from small, densely packed neurons remains challenging, particularly over time-scales relevant for learning. APPROACH We describe an assembly method for a 16-channel electrode array consisting of carbon fibers (<5 µm diameter) individually insulated ...

The aim of the experiments was to check the validity of the method of contact electrodes for studying overground locomotion in the rat. The basic indices of locomotion, obtained in 7 intact rats with at least 100 steps recorded in each, were analysed and compared with those described by other authors using different methods of movement recording. It was found that the method of contact electrod...

Cortical layers are ubiquitous structures throughout neocortex that consist of highly recurrent local networks. In recent years, significant progress has been made in our understanding of differences in response properties of neurons in different cortical layers, yet there is still a great deal left to learn about whether and how neuronal populations encode information in a laminar-specific man...

Background: Surface Electromyography (SEMG) signal has used in monitoring muscle activities. It has been widely applied in many areas, such as body member prosthesis, noise cancellation for braincomputer interface, and robotics. The SEMG acquisition method for collecting the signal with low-noise has extensively investigated in the last decade. The objective of this study is to review the recen...

A single suction electrode catheter was used for His bundle electrogram recording. His bundle pacing, and low-energy (20 or 30 J) His bundle ablation in seven dogs. The suction electrode catheter was actively fixed to the atrial endocardium at the His bundle level. Electrophysiologic studies were performed in the control state, immediately after, and late (greater than 40 days) after His bundle...

Systems designed to significantly reduce equipment cost and size for neurophysiological studies and hybrid biosensor applications were developed. Custom integrated circuits, each providing eighteen channels of amplification and filtering were designed, fabricated and tested. Planar arrays of iridium microelectrodes were fabricated and packaged in a standard 40 pin dual-in-line package for cultu...

The propagation of action potentials along the axons can be recorded via the electrical activity of the nerve (electroneurogramm). This paper focuses on the use of cuff electrodes being very usual for chronic measurement. The main issues with this kind of electrode are parasitic noise and poor selectivity of the recorded signal. Then, we propose an optimized layout for multipolar recording elec...

PURPOSE To analyze the latency and amplitude of P300 responses obtained with electrodes positioned at Cz and Fz and in different tasks of infrequent stimulus identification in normal hearing individuals. METHODS Forty adults of both genders participated in the study. Three recordings with three different tasks were obtained for the identification of the infrequent stimulus; simultaneous recor...