Related Experiment Video
Updated: Jun 4, 2026
11:26
Ratiometric Calcium Imaging of Individual Neurons in Behaving Caenorhabditis Elegans
Published on: February 7, 2018
Structural properties of the Caenorhabditis elegans neuronal network
Lav R Varshney1, Beth L Chen, Eric Paniagua
1Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America.
Plos Computational Biology
|February 10, 2011
Summary
Researchers created a complete, self-consistent map of the C. elegans nervous system, revealing key network properties and potential functional modules. This wiring diagram advances our understanding of neuronal networks and behavior.
Area of Science:
- Neuroscience
- Computational Biology
- Systems Biology
Background:
- Complete neuronal wiring diagrams are crucial for understanding brain function but remain scarce.
- Existing C. elegans connectomes are incomplete and lack self-consistency.
Purpose of the Study:
- To construct a comprehensive and self-consistent map of the Caenorhabditis elegans hermaphrodite nervous system.
- To analyze network properties and identify functional modules and key information-processing neurons.
Main Methods:
- Integration of existing data (White et al.) with new electron micrograph data.
- Development of a visualization method for network signal flow.
- Calculation of statistical and topological network properties (degree distributions, multiplicities, small-world properties).
Main Results:
- Assembly of accurate, self-consistent gap junction and chemical synapse networks for C. elegans.
- Identification of central neurons and network motifs potentially serving as functional modules.
- Analysis of neuronal activity propagation and interaction between synapse types.
Conclusions:
- The C. elegans connectome exhibits properties similar to mammalian neocortex, suggesting general principles of neuronal network organization.
- The detailed wiring diagram provides a foundation for predicting experimental outcomes and understanding the mechanistic basis of behavior.
Related Concept Videos
01:30Neuron Structure
Neurons are the main type of cell in the nervous system that generate and transmit electrochemical signals. They primarily communicate with each other using neurotransmitters at specific junctions called synapses. Neurons come in many shapes that often relate to their function, but most share three main structures: an axon and dendrites that extend out from a cell body.
Structure and Function of Neurons
The neuronal cell body—the soma— houses the nucleus and organelles vital to cellular...
Structure and Function of Neurons
The neuronal cell body—the soma— houses the nucleus and organelles vital to cellular...
01:31Neuron Structure
Overview
01:23Neurons: The Cell Body and the Dendrites
A typical nerve cell comprises three main components: the cell body, dendrites, and the axon. The cell body, also known as the soma or perikaryon, serves as the central biosynthetic hub housing a nucleus surrounded by cytoplasm containing organelles commonly found in most cells. Notably, Nissl bodies, clusters of the rough endoplasmic reticulum and free ribosomes responsible for protein synthesis, are distinctive features of the neuronal cell body. As neurons age, aggregates of a brown pigment...
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...
01:25Neural 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...
01:28Electrical 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...
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...