Focal Macropatch Electrode
Focal Macropatch Electrode - Related Videos
07:01
Focal Macropatch Recordings of Synaptic Currents from the Drosophila Larval Neuromuscular Junction
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Cited by 1 •
2017
Synaptic currents can be recorded focally from visualized synaptic boutons at the Drosophila third instar larvae neuromuscular junction. This technique enables monitoring the activity of a single synaptic bouton.
04:02
Electroencephalography Recording in a Rat Model of Focal Epilepsy
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2025
This video demonstrates a method for high-resolution EEG recording in a rat model of focal epilepsy. It outlines the steps involved in preparing the rat, connecting a multichannel EEG mini-cap to the rat's scalp, and recording the EEG to identify seizure-related events characteristic of the epilepsy model.
03:02
Standard Electrode Potentials
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2020
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
11:45
Functional Interrogation of Adult Hypothalamic Neurogenesis with Focal Radiological Inhibition
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Cited by 8 •
2013
The function of adult-born mammalian neurons remains an active area of investigation. Ionizing radiation inhibits the birth of new neurons. Using computer tomography-guided focal irradiation (CFIR), three-dimensional anatomical targeting of specific neural progenitor populations can now be used to assess the functional role of adult neurogenesis.
08:29
Fabrication of Amperometric Electrodes
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Cited by 8 •
2009
This protocol describes how to generate carbon fiber electrodes. The electrodes are subsequently used to detect catecholamine release from vesicles with carbon fiber amperometry.
FAQs
Signal localization comes from positioning the loose-seal electrode over a restricted membrane region rather than recording from the entire cell. Currents produced by ion-channel opening within that region contribute to the measured signal, allowing activity at a nerve terminal, neuromuscular junction, or other excitable membrane to be examined without averaging it across unrelated membrane areas.
A loose seal permits extracellular measurement without requiring whole-cell access. This preserves the cell’s structure while still detecting currents associated with neurotransmitter release or membrane depolarization. The configuration is therefore useful when the experiment requires localized information about synaptic events and the continued integrity of the recorded terminal or membrane region.
Spontaneous events reveal synaptic activity occurring without an experimentally specified trigger, whereas evoked events follow neurotransmitter release or membrane depolarization associated with stimulation. Recording both types helps distinguish baseline synaptic behavior from responses linked to a defined activation condition, supporting analysis of transmitter release, receptor function, and synaptic strength.
The electrode is positioned over the membrane region of interest, such as a nerve terminal, neuromuscular junction, or another excitable site. Its placement restricts the sampled membrane area, after which extracellular currents can be monitored for spontaneous or evoked synaptic events. This workflow provides local measurements while avoiding whole-cell access.
Researchers use this approach when they need to examine synaptic transmission at a defined cellular location while preserving the surrounding cellular structure. It is especially relevant for studying nerve terminals and neuromuscular junctions, where localized measurements can reveal how neurotransmitter release and receptor activity contribute to neural communication.
The recorded currents can be analyzed to quantify transmitter release, receptor function, and synaptic strength. Because the electrode samples a restricted membrane patch, the results connect electrical events with a specific synaptic or excitable region rather than the cell as a whole. This makes the method useful for evaluating localized changes in neural communication.