Related Experiment Video
Updated: Jul 18, 2026
07:38
Two-Photon Polymerization 3D-Printing of Micro-scale Neuronal Cell Culture Devices
Published on: June 7, 2024
Percolation in living neural networks
Ilan Breskin1, Jordi Soriano, Elisha Moses
1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel.
Physical Review Letters
|December 13, 2006
Summary
Researchers explored living neural networks using electrical stimulation, revealing a percolation transition in neural connectivity. This transition, marked by a power law, indicates a Gaussian degree distribution, not scale-free, regardless of neuron balance.
Area of Science:
- Neuroscience
- Complex Systems
- Network Science
Background:
- Living neural networks exhibit complex connectivity crucial for function.
- Understanding neural network dynamics under varying conditions is essential.
Purpose of the Study:
- To investigate the behavior of neural connectivity during a percolation transition.
- To characterize the disintegration of the giant component in neural networks.
- To determine the nature of the degree distribution in these networks.
Main Methods:
- Utilizing global electrical stimulation to probe living neural networks.
- Modulating neural connectivity by reducing synaptic strength and blocking neurotransmitter receptors.
- Applying graph-theoretic analysis to study network transitions.
Main Results:
- Neural connectivity was observed to undergo a percolation transition.
- The disintegration of the giant component followed a power law with an exponent beta ≈ 0.65.
- The exponent beta was independent of the balance between excitatory and inhibitory neurons.
Conclusions:
- The study demonstrates a percolation transition in living neural networks.
- The observed power-law exponent suggests a Gaussian degree distribution, differing from typical scale-free network models.
- These findings offer insights into the fundamental principles governing neural network organization and dynamics.
Related Concept Videos
01:25Neural Circuits
Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
01:23Propagation of Action Potentials
The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
01:28Neuronal 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...
01:20Parallel Processing
The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
01:22Neurons as Communicators of the Brain
Neurons, the fundamental units of the brain and nervous system, function as the primary transmitters of information throughout the body. Their ability to communicate through electrical and chemical signals is vital for every bodily function, from regulating the heartbeat to processing complex thoughts. Each neuron has three main components: the cell body (soma), dendrites, and an axon, each specialized to facilitate swift and efficient neural communication.
Cell Body
The cell body, also known...
Cell Body
The cell body, also known...
01:37Neural Regulation
Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.