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Related Experiment Video

Updated: Apr 10, 2026

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Published on: May 12, 2019

Endogenous sequential cortical activity evoked by visual stimuli.

Luis Carrillo-Reid¹, Jae-Eun Kang Miller², Jordan P Hamm²

¹Neurotechnology Center, Department of Biological Sciences and Neuroscience, Columbia University, New York, New York 10027 lc2998@columbia.edu.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience

|June 12, 2015

Summary

This summary is machine-generated.

Neuronal groups in the visual cortex use sequential firing patterns to encode visual information. These patterns, observed during both stimulation and spontaneous activity, suggest a neural basis for dynamic visual perception.

Keywords:

graph theory in vivo calcium imaging multidimensional population vectors neuronal ensembles primary visual cortex two-photon microscopy

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Area of Science:

Neuroscience
Computational Neuroscience
Systems Neuroscience

Background:

Individual neuron function in the primary visual cortex is well-understood.
How neuronal populations encode dynamic visual stimuli via temporal patterns remains largely unknown.

Purpose of the Study:

To investigate how neuronal groups in the primary visual cortex encode changing visual stimuli using temporal activity patterns.
To identify neuronal ensembles and their activity dynamics during visual processing.

Main Methods:

In vivo two-photon calcium imaging in awake mice.
Recording neuronal population activity with and without visual stimulation.
Multidimensional analysis of network activity to identify synchronous neuronal ensembles.

Main Results:

Identified neuronal ensembles firing in synchrony.
Observed sequential temporal patterns in ensemble activity, occurring more often than chance.
Found that visual stimuli, like natural scenes, triggered these sequential patterns.
Detected similar sequential patterns during spontaneous activity, with precise single-cell firing sequences.
Demonstrated that intrinsic network dynamics could predict future ensemble occurrences.

Conclusions:

Visual stimuli recruit spontaneous sequential patterns, supporting the Hebbian cell assembly hypothesis.
Predefined temporal sequences in cell assemblies may form the microcircuit basis for encoding dynamic visual percepts.