Physiological Signal Recorder
Physiological Signal Recorder - Related Videos
10:00
Physiological Recordings of High and Low Output NMJs on the Crayfish Leg Extensor Muscle
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Cited by 13 •
2010
This article demonstrates how to conduct electrophysiological recordings of synaptic responses on the extensor muscle in the walking leg of a crayfish and how the nerve terminals are visualized to show the gross morphological differences of high- and low-output nerve terminals.
02:52
Recording Brain Signals from Freely Moving Piglets
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2025
This video demonstrates the recording of brain signals from a freely moving piglet. The piglet's head is cleaned, and the electrodes are attached. These electrodes are then connected to a telemetry unit. The setup is secured with silicone rubber. The piglet is allowed to acclimate before data recording.
02:36
In Vivo Recording of Intracellular Signals from a Single Neuron
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2025
This video demonstrates the recording of electrical signals from single brain neurons using a fine-tipped glass micropipette and a specialized setup. The micropipette is carefully inserted into the rat's brain and is buzzed to penetrate the neuron to record internal neuronal electrical signals.
05:35
Imaging Ca2+ Signals in Small Pulmonary Veins at Physiological Intraluminal Pressures
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2025
In this protocol, we present a novel technique for recording and analyzing Ca2+ signals in intrapulmonary veins (small pulmonary veins or PVs) at physiological intraluminal pressures. The technique involves isolating small PVs, incubating them with a Ca2+ indicator, cannulating and pressurizing them, confocal imaging of Ca2+ signals, and data analysis.
06:15
Zebra II as A Novel System to Record Electrophysiological Signals in Zebrafish
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2024
The study introduces Zebra II, an advanced system for prolonged ECG acquisition and analysis in zebrafish. This system features an independent perfusion system and multiple-point electrodes for handling multiple fish in controlled environments. Acute effects of Amiodarone were assessed and analyzed with wild-type zebrafish.
FAQs
Amplification increases weak biological signal outputs to measurable levels, while filtering helps reduce unwanted signal components and noise. Digitization converts the conditioned electrical signal into stored numerical data for later analysis. These stages determine how faithfully cardiac, brain, muscle, blood pressure, or respiratory activity is preserved, directly influencing the reliability of physiological interpretation.
Electrode placement affects whether the recorder captures the intended biological activity accurately, whereas noise can obscure or distort that activity. Careful control of both factors improves signal quality before amplification, filtering, and storage. This is especially important when measurements are interpreted to identify abnormal function, compare recordings over time, or evaluate treatment responses.
The recording system must receive signals produced by different physiological sources, including cardiac electrical activity, brain activity, muscle activity, blood pressure, and respiration. Sensors convert each source into an electrical output that can be processed and preserved. The resulting modality-specific recordings support assessments such as electrocardiography, electroencephalography, and electromyography.
A reliable workflow begins by selecting sensors appropriate to the biological activity being measured and positioning them carefully. The recorder then acquires the sensor output, amplifies and filters it, digitizes the conditioned signal, and stores the resulting data. Controlling noise and sampling conditions throughout the process supports dependable analysis and interpretation.
These systems are used when biological function must be assessed directly, monitored over time, or examined during biomedical research. Depending on the target activity, recordings can support electrocardiography, electroencephalography, electromyography, blood-pressure measurement, or respiration monitoring. They are particularly relevant for identifying abnormal function and evaluating whether physiology changes after treatment.
Stored recordings provide data for analyzing physiological activity rather than relying only on a single immediate observation. Clinicians and researchers can examine abnormal function, follow changes over time, and compare physiological responses with treatment. The value of these conclusions depends on accurate acquisition, controlled recording conditions, and careful interpretation of the preserved signal data.