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Synaptic Signaling

Synaptic Signaling

Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...

Synaptic Signaling

Synaptic Signaling

Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.

The Synapse

The Synapse

Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.

Neuronal Communication

Neuronal Communication

Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...

Overview of Synapses

Overview of Synapses

A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...

Electrical Synapses

Electrical Synapses

Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...

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Related Experiment Video

Updated: Jun 29, 2026

Two-Photon Polymerization 3D-Printing of Micro-scale Neuronal Cell Culture Devices

Two-Photon Polymerization 3D-Printing of Micro-scale Neuronal Cell Culture Devices

Published on: June 7, 2024

Synaptic connectivity in engineered neuronal networks.

Peter Molnar¹, Jung-Fong Kang, Neelima Bhargava

¹Nanoscience Technology Center, University of Central Florida, Orlando, FL, USA.

Methods in Molecular Biology (Clifton, N.J.)

|October 2, 2008

Summary

This summary is machine-generated.

Researchers developed a novel method to organize cells using engineered chemical cues, enabling the study of neuronal connectivity patterns in engineered neuronal networks. This approach simplifies complex synaptic transmission studies in cell cultures.

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Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits

Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits

Published on: April 15, 2015

Area of Science:

Neuroscience
Cell Biology
Biotechnology

Background:

Studying synaptic transmission is challenging in random cell cultures due to complex interactions.
Existing methods often rely on intact cellular architecture (organotypic cultures, brain slices, in vivo).

Purpose of the Study:

To develop a method for organizing cells in dissociated cultures using engineered chemical cues.
To determine connectivity patterns in these engineered neuronal networks.
To enable the study of complex synaptic transmission in a simplified cell culture system.

Main Methods:

Utilized self-assembled monolayers (SAMs) and photolithography to create surface patterns.
Plated embryonic hippocampal cells on these patterns in serum-free medium.
Employed basic electrophysiological methods to characterize synaptic connectivity.

Main Results:

Engineered surface patterns successfully guided cell organization into neuronal networks.
Characterized synaptic connectivity within these engineered two-cell networks.
Demonstrated the feasibility of studying complex phenomena in a simplified, functional cell culture system.

Conclusions:

Engineered neuronal networks provide a simplified yet functional system for studying synaptic transmission.
This method allows for the investigation of cellular interactions and connectivity patterns.
Offers a valuable tool for neuroscience research beyond traditional complex models.