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Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at the...
Neuronal Communication01:28

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...
Neuron Structure01:30

Neuron 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...

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Related Experiment Video

Updated: Jun 20, 2026

Statistical Modelling of Cortical Connectivity Using Non-invasive Electroencephalograms
08:51

Statistical Modelling of Cortical Connectivity Using Non-invasive Electroencephalograms

Published on: November 1, 2019

Statistical mechanics of the neocortex.

Michael A Buice1, Jack D Cowan

  • 1NIH/NIDDK/LBM, Bethesda, MD 20892, USA.

Progress in Biophysics and Molecular Biology
|August 22, 2009
PubMed
Summary

Neocortical brain activity exhibits a dynamical phase transition, similar to directed percolation (DP). This critical behavior explains brain activity patterns across various states, from normal to epileptic.

Area of Science:

  • Theoretical neuroscience
  • Non-equilibrium statistical physics
  • Computational neuroscience

Background:

  • Neocortical dynamics are complex, involving neural fluctuations and responses.
  • Existing models often rely on mean-field approximations, neglecting critical fluctuations.

Purpose of the Study:

  • To develop a theoretical model of neocortical dynamics beyond the mean-field approximation.
  • To investigate the role of fluctuations and correlations in critical brain activity.
  • To explain observed scaling laws in neocortical activity.

Main Methods:

  • Utilizing field theoretic methods for non-equilibrium statistical processes.
  • Developing a Markovian model for neural dynamics.
  • Analyzing phase transitions and universality classes.

More Related Videos

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
08:45

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example

Published on: October 24, 2012

Large-scale Three-dimensional Imaging of Cellular Organization in the Mouse Neocortex
09:55

Large-scale Three-dimensional Imaging of Cellular Organization in the Mouse Neocortex

Published on: September 5, 2018

Related Experiment Videos

Last Updated: Jun 20, 2026

Statistical Modelling of Cortical Connectivity Using Non-invasive Electroencephalograms
08:51

Statistical Modelling of Cortical Connectivity Using Non-invasive Electroencephalograms

Published on: November 1, 2019

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
08:45

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example

Published on: October 24, 2012

Large-scale Three-dimensional Imaging of Cellular Organization in the Mouse Neocortex
09:55

Large-scale Three-dimensional Imaging of Cellular Organization in the Mouse Neocortex

Published on: September 5, 2018

Main Results:

  • Neocortical activity shows a dynamical phase transition in the universality class of directed percolation (DP) at low spiking rates.
  • A crossover from a mean-field region to a critical fluctuation-driven DP region was identified.
  • The model explains scaling laws observed in anesthetized, normal, and epileptic neocortex.

Conclusions:

  • The study provides a theoretical framework incorporating critical fluctuations and correlations in neocortical activity.
  • Directed percolation and related phase transitions offer a unifying explanation for brain activity patterns.
  • The model elucidates the origins of both random and rhythmic brain activity.