Synaptic Current Recording
Synaptic Current Recording - Related Videos
03:11
Recording Synaptic Currents at the Drosophila Larval Neuromuscular Junction
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2025
This video demonstrates the technique for recording synaptic currents from a synaptic bouton at the Drosophila larva's neuromuscular junction. This technique enables monitoring the activity of a single synaptic bouton, which is important for the study of mutant fly lines with enhanced spontaneous or asynchronous synaptic activity.
19:33
Whole-cell Recordings of Light Evoked Excitatory Synaptic Currents in the Retinal Slice
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Cited by 2 •
2008
This video shows the process of whole-cell voltage clamp recordings in the retinal slice of the aquatic tiger salamander. We demonstrate the preparation of the slice as well as how to perform patch clamp recordings during visual stimulation of the retina.
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.
03:10
Recording CA3-CA1 Synaptic Responses in a Rat Hippocampal Slice
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2025
This video demonstrates a method to record CA3-CA1 synaptic responses in a rat hippocampal slice. It outlines the steps involved in placing the stimulating and recording electrodes on the hippocampal slice and measuring the field excitatory postsynaptic potential (fEPSP) to assess synaptic response strength.
03:18
Optogenetic Stimulation and Electrophysiological Recording of Synaptic Events in Rat Brain Slices
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2025
This video demonstrates the procedure for studying synaptic efficiency in the lateral entorhinal cortex (LEC) by optogenetically stimulating medial prefrontal cortex (mPFC) axons and recording the responses of pyramidal neurons in the LEC. This method combines patch-clamp recordings with synaptic activation by light stimulation to study synaptic plasticity.
FAQs
Voltage control in a patch-clamp experiment holds the recorded neuron at a selected membrane voltage while synaptic events occur. This separates the current flowing through postsynaptic ion channels from broader changes in membrane voltage. When presynaptic activity releases neurotransmitter, channel activation appears as a measurable current, allowing investigators to examine synaptic transmission directly at the postsynaptic cell.
The method can distinguish whether synaptic activation produces excitatory or inhibitory currents and can assess the function of the neurotransmitter receptors involved. Comparing these electrical responses under defined experimental conditions helps connect the recorded signal to postsynaptic ion-channel activity. This makes the technique useful for separating different mechanisms that contribute to synaptic communication.
Presynaptic activity provides the trigger for neurotransmitter release, whereas postsynaptic ion channels generate the current detected by the recording. Observing both stages in one experiment helps investigators relate neuronal activity to its postsynaptic electrical consequence. This organization is particularly valuable when researchers want to distinguish mechanisms of neurotransmitter release from mechanisms involving postsynaptic receptor or channel function.
Changes produced by drugs, development, or disease can appear as altered synaptic currents, revealing that neural communication has been modified. Researchers can use these recordings to evaluate effects on neurotransmitter receptor function and other synaptic mechanisms. The resulting measurements provide a cellular electrical readout for comparing normal transmission with transmission altered by experimental treatment or neurological pathology.
A typical experiment begins by placing a patch-clamp micropipette onto a neuron and forming a seal that permits electrical control of the cell membrane. The investigator then controls the membrane voltage while activating presynaptic activity. Neurotransmitter release follows, postsynaptic ion channels respond, and the resulting excitatory or inhibitory current is measured for analysis of synaptic transmission.
The essential setup includes a patch-clamp system, a micropipette, and a neuron that can be maintained under controlled membrane-voltage conditions. The pipette must seal onto the cell so the experimenter can control its membrane voltage and detect synaptic currents. Presynaptic activity must also be available to trigger neurotransmitter release and produce a measurable postsynaptic response.
Researchers choose this approach when they need a direct electrical view of synaptic transmission rather than only a general indication of neuronal activity. It can reveal excitatory and inhibitory currents, test neurotransmitter receptor function, and distinguish synaptic mechanisms. These capabilities support studies of how specific drugs, developmental changes, or disease-related alterations affect communication between neurons.
By measuring currents produced during neuronal communication, the technique connects cellular ion-channel activity with the function of neural circuits. Researchers can use it to examine receptor function and synaptic mechanisms relevant to circuit operation, learning, and neurological disorders. Comparisons across experimental conditions can show how altered synaptic transmission may contribute to changes in neural function.