Synaptic Input Stimulation
Synaptic Input Stimulation - Related Videos
09:12
Channelrhodopsin2 Mediated Stimulation of Synaptic Potentials at Drosophila Neuromuscular Junctions
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Cited by 24 •
2009
This procedure uses a blue light-activated algal channel and cell-specific genetic expression tools to evoke synaptic potentials with light pulses at the neuromuscular junction (NMJ) in Drosophila larvae. This technique is an inexpensive and easy-to-use alternative to suction electrode stimulation for synaptic physiology studies in research and teaching laboratories.
08:46
Studying Synaptic Vesicle Pools using Photoconversion of Styryl Dyes
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Cited by 18 •
2010
FM dyes have been of invaluable help in the understanding of synaptic dynamics. FMs are normally followed under the fluorescent microscope during different stimulation conditions. However, photoconversion of FM dyes combined with electron microscopy allows the visualization of distinct synaptic vesicle pools, among other ultrastructure components, in synaptic boutons.
16:45
Simultaneous Two-photon In Vivo Imaging of Synaptic Inputs and Postsynaptic Targets in the Mouse Retrosplenial Cortex
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Cited by 6 •
2016
This video shows the craniotomy procedure that allows chronic imaging of neurons in mouse retrosplenial cortex using in vivo two photon microscopy in Thy1-GFP transgenic line. This approach is combined with injection of mCherry-expressing adeno-associated virus into dorsal hippocampus. These techniques allow long-term monitoring of experience-dependent structural plasticity in RSC.
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.
11:29
Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents
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Cited by 52 •
2015
This video article describes experimental procedures to study long-term plasticity and its associative processes such as synaptic tagging, capture and cross-tagging in the CA1 pyramidal neurons using acute hippocampal slices from rodents.
FAQs
Electrical pulses and light-sensitive proteins provide different ways to recruit presynaptic pathways. Electrical stimulation delivers pulses to activate axons, whereas light-sensitive proteins allow researchers to trigger action potentials in selected axons using light. In either case, the critical downstream event is neurotransmitter release, which links pathway activation to a postsynaptic current or potential.
Input strength and timing shape how a postsynaptic neuron responds. Changing these variables lets investigators assess how strongly a pathway drives synaptic responses and how the temporal relationship between inputs and neuronal activity affects signaling. This makes stimulation useful for characterizing neural circuit connectivity rather than merely showing that presynaptic axons can be activated.
Repeated or patterned stimulation is especially informative because it can expose lasting changes in synaptic efficacy. Depending on the stimulation pattern and resulting response, experiments can reveal long-term potentiation or long-term depression. These outcomes connect patterns of neural activity with synaptic plasticity, providing a way to examine mechanisms relevant to learning and memory.
A basic experiment begins by selecting a presynaptic pathway, applying electrical pulses or light to activate its axons, and recording the postsynaptic response. Researchers can then vary input strength or timing and compare the resulting currents or potentials. Repeating the stimulation in defined patterns adds a second phase for testing whether synaptic responses undergo plastic changes.
These measurements show how the postsynaptic neuron responds after presynaptic stimulation and provide a readout of synaptic signaling. Comparing responses across pathways can help characterize neural circuit connectivity, while examining changes as input strength or timing varies reveals how those parameters influence transmission. The measurements therefore connect stimulation conditions with circuit-level function.
Synaptic input stimulation is useful when the goal is to examine how defined presynaptic activity affects a neuron or circuit. It supports studies of synaptic transmission and connectivity, as well as experiments on activity-dependent plasticity. Because repeated patterns can reveal long-term potentiation or depression, the approach also helps investigate mechanisms related to learning, memory, and circuit dysfunction.