Neural Recordings
Neural Recordings - Related Videos
10:44
Construction of Microdrive Arrays for Chronic Neural Recordings in Awake Behaving Mice
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Cited by 30 •
2013
The design and assembly of microdrives for in vivo electrophysiological recordings of brain signals from the mouse is described. By attaching microelectrode bundles to sturdy driveable carriers, these techniques allow for long-term and stable neural recordings. The lightweight design allows for unrestricted behavioral performance by the animal following drive implantation.
08:53
Recordings of Neural Circuit Activation in Freely Behaving Animals
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Cited by 7 •
2009
Non-invasive measurements of neural activity patterns in freely behaving animals are obtained by combining neurophysiological recordings with high speed videography.
09:27
A Method for Systematic Electrochemical and Electrophysiological Evaluation of Neural Recording Electrodes
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Cited by 9 •
2014
Different electrode coatings affect neural recording performance through changes to electrochemical, chemical and mechanical properties. Comparison of electrodes in vitro is relatively simple, however comparison of in vivo response is typically complicated by variations in electrode/neuron distance and between animals. This article provides a robust method to compare neural recording electrodes.
03:25
Recording Neural Activity of Unfolded Hippocampal Tissue Using Penetrating Microelectrode Array
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2025
This video demonstrates the procedure to set up a recording chamber with a penetrating microelectrode array (PMEA) to capture neural signals from an unfolded hippocampus. This method allows us to study the speed and direction of propagation of neural activity within the unfolded hippocampus in vitro.
10:51
Neural Circuit Recording from an Intact Cockroach Nervous System
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Cited by 13 •
2013
This article describes the cockroach ventral nerve cord dissection and extracellular recordings from the cercal nerve and connectives. Evoked responses are generated by electrical stimulation of the cercal nerve or direct mechanical stimulation of the cerci.
FAQs
Electrophysiological recordings detect voltage changes caused by ion movement across neuronal membranes. These changes can appear as brief action potentials, slower local field potentials, or activity reflecting groups of neurons. The measured signal therefore depends on the electrical events being monitored and whether the recording emphasizes individual neuronal events, nearby circuit activity, or broader population dynamics.
Action potentials represent brief electrical events associated with neuronal signaling, whereas local field potentials reflect slower voltage fluctuations in a surrounding neural region. Population activity summarizes signals from larger groups of neurons. Comparing these signal types helps investigators examine neural processing at different organizational scales, from individual events to circuit-level or population-level activity.
Some approaches focus on electrical signals detected with electrodes, while related methods monitor events inside neurons or changes in calcium dynamics. These measurements provide different views of neural activity rather than interchangeable signals. The choice determines whether an experiment emphasizes membrane-related electrical events, intracellular processes, or calcium-associated changes in neuronal activity.
Miniaturized electrodes and high-density sensors enable measurements from larger neural populations with greater precision. This technological shift can expand the amount of activity observed within a nervous system and improve the ability to examine coordinated patterns across neurons. In neuroscience, such recordings support more detailed investigations of how neural circuits represent and process information.
A general workflow begins by selecting a recording approach suited to the neural activity of interest, such as electrical signals, intracellular events, or calcium dynamics. Sensors or electrodes then detect the relevant activity, and the resulting signals are examined as individual events, local fluctuations, or population patterns. Interpretation connects those measurements with neural processing, circuits, or behavior.
Researchers use these measurements to connect neural activity with sensation, movement, cognition, and behavior. They also apply them to investigate brain circuits and neurological disorders, where activity patterns may reveal how nervous-system function changes. Because recordings provide direct measurements of neural activity, they are valuable for relating physiological signals to observable functions and outcomes.
Brain-computer interfaces can use recorded neural activity as a physiological signal associated with nervous-system function. Neural recordings provide the activity measurements needed to examine relationships between brain signals and intended or observed functions. Advances in miniaturized electrodes and high-density sensors may support recordings from larger neural populations, expanding the information available for such applications.