Neuronal Connections
Neuronal Connections - Related Videos
10:26
Rewiring Neuronal Circuits: A New Method for Fast Neurite Extension and Functional Neuronal Connection
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Cited by 8 •
2017
This procedure describes how to rapidly initiate, extend and connect neurites organized in microfluidic chambers using poly-D-lysine-coated beads fixed to micropipettes that guide neurite elongation.
11:22
An Optogenetic Approach for Assessing Formation of Neuronal Connections in a Co-culture System
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Cited by 20 •
2015
A protocol to generate a co-culture system consisting of neurons derived from induced pluripotent stem cells (iPSCs), primary cortical neurons and astrocytes is described. This co-culture system allows detection of the formation of synaptic contacts and circuits between new, iPSC-derived neurons and pre-existing cortical neurons expressing channelrhodopsin-2.
10:31
In Vitro Wedge Slice Preparation for Mimicking In Vivo Neuronal Circuit Connectivity
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Cited by 3 •
2020
Integration of diverse synaptic inputs to neurons is best measured in a preparation that preserves all pre-synaptic nuclei for natural timing and circuit plasticity, but brain slices typically sever many connections. We developed a modified brain slice to mimic in vivo circuit activity while maintaining in vitro experimentation capability.
07:03
Initiating Rapid Neurite Extension and Formation Functional Neuronal Connections
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2025
This video demonstrates a technique for the rapid initiation and extension of a neuron and creation of new connections with a target neuron using a microfluidic device and micromanipulation. This could be used for therapies that aim to reconnect neuronal circuits after trauma or in neurodegenerative diseases.
10:49
In Utero Electroporation Approaches to Study the Excitability of Neuronal Subpopulations and Single-cell Connectivity
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Cited by 10 •
2017
This manuscript provides protocols that use in utero electroporation (IUE) to describe the structural connectivity of neurons at the single-cell level and the excitability of fluorescently labeled neurons. Histology is used to characterize dendritic and axonal projections. Whole-cell recording in acute slices is used to investigate excitability.
FAQs
The critical step is the change in the receiving neuron’s electrical state after a neurotransmitter binds its receptor. That change determines how the cell responds to subsequent signals and whether activity influences the next stage of a neural circuit. This links molecular events at individual synapses with larger processes such as information flow and coordinated neural activity.
Chemical synapses transmit information through neurotransmitter release and receptor binding, whereas direct electrical coupling allows neurons to communicate without that chemical signaling sequence. This distinction gives the nervous system more than one way to coordinate activity. Comparing both forms helps researchers determine how different connection types contribute to circuit operation and information transfer.
Synaptic plasticity changes the strength of communication between neurons, so the same signal can produce a different effect over time. These lasting changes alter how neural circuits respond to activity and provide a cellular basis for learning and memory. Plasticity also supports development and adaptation by allowing circuit communication to change rather than remain fixed.
A connection’s strength determines how strongly activity in one neuron affects another. Changes in that influence can modify the way signals are integrated across a circuit, shaping coordinated activity and responses. At the systems level, such changes help explain how neuronal connections contribute to sensory processing, behavior, learning, and adaptation.
Examining these connections allows researchers to relate cellular communication to the operation of neural circuits. The resulting perspective can clarify how the nervous system processes sensory information, coordinates activity, and supports behavior. It also connects changes at individual synapses with broader patterns of nervous-system function, making connectivity central to neuroscience research.
Disrupted communication between neurons can interfere with coordinated neural activity and circuit function. Studying these changes helps researchers investigate disorders in which signaling becomes abnormal, including epilepsy and neurodegenerative disease. The same framework also supports comparison between typical and impaired communication, linking cellular connection mechanisms with disease-related changes in nervous-system behavior.