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Related Concept Videos

Neural Circuits01:25

Neural 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...
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...
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Association Areas of the Cortex01:21

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...

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Related Experiment Video

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Neuroimaging-Guided TMS–EEG for Real-Time Cortical Network Mapping
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Published on: June 13, 2025

Face activated neurodynamic cortical networks.

Ana Susac1, Risto J Ilmoniemi, Doug Ranken

  • 1Department of Physics, Faculty of Science, University of Zagreb, Bijenicka c. 32, Zagreb, Croatia. ana@phy.hr

Medical & Biological Engineering & Computing
|February 10, 2011
PubMed
Summary

This study reveals the brain

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Brain Imaging

Background:

  • Complex visual stimuli like faces activate widespread brain regions.
  • The dynamic and complex nature of cortical networks during face processing remains poorly understood.
  • Existing neuroimaging methods have limitations in tracking spatio-temporal dynamics over extended periods.

Purpose of the Study:

  • To investigate the feasibility of accurate, efficient, and reliable spatio-temporal tracking of cortical pathways during face processing.
  • To explore face-processing dynamics and task modulation using a data-driven approach.
  • To analyze the complexity of activated cortical networks over prolonged time intervals.

Main Methods:

  • Utilized simulated and empirical magnetoencephalography (MEG) data from an oddball face recognition task.

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  • Applied a data-driven, semi-automated spatio-temporal source localization technique.
  • Employed the Calibrated Start Spatio-Temporal (CSST) algorithm with multi-start downhill simplex optimization.

    • Main Results:

    • Simulations confirmed improved accuracy in source localization and activity onset estimation using the CSST algorithm.
    • Identified a distributed cortical network involved in face processing.
    • Demonstrated task-dependent modulation of network complexity and an early onset of activity in the fusiform face gyrus (FFG).

    Conclusions:

    • The study provides the first non-invasive evidence, consistent with intracranial recordings, of early FFG activation during face processing.
    • Frontal brain activation was observed to precede parietal activation for target face responses.
    • The developed methodology enables robust spatio-temporal tracking of neural dynamics in complex cognitive tasks.