Single Cell Electrophysiology
Single Cell Electrophysiology - Related Videos
09:11
Aplysia Ganglia Preparation for Electrophysiological and Molecular Analyses of Single Neurons
0 Views •
Cited by 9 •
2014
Marine snail Aplysia californica has been widely used as a neurobiology model for the studies on cellular and molecular basis of behavior. Here a methodology is described for exploring the nervous system of Aplysia for the electrophysiological and molecular analyses of single neurons of identified neural circuitry.
07:17
Electrophysiological Recordings of Single-cell Ion Currents Under Well-defined Shear Stress
0 Views •
Cited by 3 •
2019
The goal of this protocol is to describe a modified parallel plate flow chamber for use in investigating real time activation of mechanosensitive ion channels by shear stress.
10:46
Non-fluoroscopic Catheter Tracking for Fluoroscopy Reduction in Interventional Electrophysiology
0 Views •
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.
10:36
Culturing and Electrophysiology of Cells on NRCC Patch-clamp Chips
0 Views •
Cited by 6 •
2012
We show how planar patch-clamp chips fabricated at the National Research Council of Canada are sterilized, primed, loaded with medium, plated with cells, and used for electrophysiological recordings.
05:41
Applying Microfluidics to Electrophysiology
0 Views •
Cited by 1 •
2007
Microfluidics can be integrated with standard electrophysiology techniques to allow new experimental modalities. Specifically, the motivation for the ...
FAQs
The two recording modes answer different electrical questions. Voltage clamp controls the cell’s membrane voltage while measuring ionic currents through channels, whereas current-clamp recordings measure membrane voltage under defined conditions, including changes associated with excitability. Comparing these outputs helps distinguish channel activity from the voltage responses that result when a cell receives or integrates electrical signals.
A high-resistance seal between the glass micropipette and cell membrane creates a controlled electrical connection to the individual cell. This arrangement supports measurement of membrane voltage or ionic currents under defined conditions, making channel behavior and cellular responses more interpretable. The seal is therefore central to obtaining measurements that can be related to specific neuronal properties rather than mixed cellular activity.
Recordings can characterize resting potential, action potentials, synaptic currents, and overall excitability. Together, these measurements show how a neuron maintains its electrical state, responds when its membrane voltage changes, and receives or integrates synaptic input. Examining several properties in the same experimental framework helps connect ion-channel function with the signaling behavior of an individual cell.
A typical workflow places a glass micropipette against the membrane of the selected cell and forms a high-resistance seal. The experiment then records membrane voltage or controls voltage while measuring ionic currents. Under defined conditions, the resulting traces can be examined for resting potential, action potentials, synaptic currents, or changes in excitability.
Researchers use these recordings when they need to connect cellular electrical behavior with broader neural questions. Applications described for the method include studying development, disease mechanisms, and the effects of drugs or genetic changes. Because measurements are made from individual cells, investigators can assess how those conditions alter ion-channel function, synaptic transmission, or neuronal excitability.
Single-cell measurements provide cellular evidence that can be related to activity at larger neural scales. Ionic currents reflect channel function, while synaptic currents indicate input received by the neuron; membrane voltage and action potentials show how that input is integrated and transmitted. This connection helps neuroscience studies interpret how cellular changes may influence circuit behavior.