Related Experiment Video
Updated: Jun 25, 2026
09:55
Large-scale Three-dimensional Imaging of Cellular Organization in the Mouse Neocortex
Published on: September 5, 2018
Organization of cell assemblies in the hippocampus
Kenneth D Harris1, Jozsef Csicsvari, Hajime Hirase
1Center for Molecular and Behavioral Neuroscience, Rutgers, The State University of New Jersey, 197 University Avenue, Newark, New Jersey 07102, USA.
Nature
|August 2, 2003
Summary
Neurons synchronize in precise time windows, forming cell assemblies for information processing. This neural synchrony, crucial for brain function, occurs within 10-30 milliseconds.
Area of Science:
- Neuroscience
- Computational Neuroscience
Background:
- Neurons exhibit precise action potential firing.
- The role of temporal precision in neural information processing is debated.
- The cell assembly hypothesis proposes transient neuronal synchrony for cognitive functions.
Purpose of the Study:
- To investigate if and how neuronal temporal precision is utilized in information processing.
- To test the cell assembly hypothesis in the hippocampus.
- To determine the timescale of neuronal synchrony relevant for information processing.
Main Methods:
- Simultaneous recording of hippocampal pyramidal cell spike times.
- Predicting spike times using neuronal activity and animal spatial location.
- Analyzing spike time prediction improvements with spatial and phase modulation.
Main Results:
- Simultaneously recorded neuronal spike times improved prediction accuracy.
- Prediction accuracy was enhanced by incorporating spatial information and theta phase modulation.
- Optimal prediction window for simultaneous neuronal activity was 10-30 ms.
Conclusions:
- Hippocampal cell assemblies synchronize on a 10-30 ms timescale.
- This timescale aligns with neuronal membrane time constants, gamma oscillations, and synaptic plasticity.
- Cooperative neuronal activity at this timescale is proposed as optimal for cortical information transmission and storage.
More Related Videos
Related Concept Videos
01:32Assembly of Complex Microtubule Structures
Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
01:15Functional Brain Systems: Limbic System
The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
01:19Role of Hippocampus in Memory
The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...