Cellular Electrophysiology
Cellular Electrophysiology - Related Videos
10:46
Non-fluoroscopic Catheter Tracking for Fluoroscopy Reduction in Interventional Electrophysiology
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Cited by 4 •
2015
Radiation exposure is an underestimated risk in complex ablation procedures. Here, we describe a protocol to significantly decrease fluoroscopy time and dosage for both the patient and the lab staff by using a novel non-fluoroscopic catheter visualization system.
05:46
Electrophysiological Methods for Recording Synaptic Potentials from the NMJ of Drosophila Larvae
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Cited by 29 •
2009
Here we describe electrophysiological methods for measuring synaptic transmission at the neuromuscular junction of Drosophila larva. Evoked release is initiated artificially by stimulating the motor neuron axons, and transmission through the NMJ can be measured by the postsynaptic response evoked in the muscle.
05:41
Applying Microfluidics to Electrophysiology
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Cited by 1 •
2007
Microfluidics can be integrated with standard electrophysiology techniques to allow new experimental modalities. Specifically, the motivation for the ...
09:42
Electrophysiological Recording in the Brain of Intact Adult Zebrafish
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Cited by 14 •
2013
This paper describes how an adult zebrafish can be immobilized, intubated, and used for in vivo electrophysiological experiments to allow recordings and manipulation of neural activity in an intact animal.
11:25
An Introduction to Cellular and Molecular Neuroscience
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2023
Cellular and molecular neuroscience is one of the newest and fastest growing subdisciplines in neuroscience. By investigating the influences of genes, signaling molecules, and cellular morphology, researchers in this field uncover crucial insights into normal brain development and function, as well as the root causes of many pathological conditions. This video introduction to the fascinating world of cellular and molecular neuroscience begins with a timeline of landmark studies, from the...
FAQs
Ion gradients create a difference in charge across the cell membrane, while selective permeability determines which ions can cross at a given time. Ion channels therefore regulate membrane voltage by controlling ion movement. Changes in channel activity can shift the voltage away from its resting state, providing the electrical basis for signaling in neurons, muscle cells, and other excitable tissues.
Depolarization and repolarization describe changes in membrane potential during electrical activity. Depolarization moves the membrane voltage in one direction as ion movement changes, whereas repolarization returns the voltage toward its prior state. Together, these changes help characterize action potentials and other signals, allowing electrophysiological measurements to relate membrane-voltage patterns to cellular communication and function.
Cellular electrophysiology links changes in ionic currents and membrane voltage to recognizable cellular events. In neurons, these measurements help examine action potentials and synaptic signaling, while in muscle cells they help investigate electrical activity associated with contraction. This connection allows researchers to study how channel behavior supports communication rather than treating voltage changes as isolated observations.
Electrical activity supports different biological functions in different excitable tissues. In neurons, measured signals relate to communication and synaptic signaling; in muscle cells, they relate to cellular function; and in cardiac tissue, they contribute to rhythm. Comparing these systems helps researchers identify how membrane voltage and ion movement are adapted to distinct physiological roles.
The field can quantify membrane voltage and ionic currents, two measurements that reveal complementary aspects of electrical activity. Microelectrode measurements examine electrical behavior through electrode-based recordings, while patch-clamp recording measures activity associated with the cell membrane and its ion channels. These data help connect observed voltage changes with the underlying movement of ions.
These methods are useful when researchers need direct measurements of electrical activity in individual cells or excitable tissues. Their applications include investigating neuronal signaling, muscle-cell activity, cardiac rhythm, neurological disease, and heart disorders. The resulting measurements can also support pharmacology research and the development of bioelectronic technologies by showing how electrical behavior changes under study conditions.