The persistent and broadly distributed EEG synchronization might inhibit the normal processing capability of the...

Area of Science:

• Neuroscience
• Cognitive Science
• Computational Neuroscience

Background:

• Brain synchrony reflects neuronal assembly interactions.
• Excessive or prolonged coupling can impair information routing and processing.
• Understanding abnormal synchrony is crucial for neurological and psychiatric disorders.

Purpose of the Study:

• To investigate if sustained oscillatory states and common mode functional connectivity inhibit brain information processing.
• To test the hypothesis that greater regularity-rhythmicity correlates with component self-organization and isolation in pathological brain states.
• To examine this in the context of thought blocks during auditory verbal hallucinations and epileptic absences.

Main Methods:

• Investigated sustained oscillatory states and common mode functional connectivity.
• Examined the relationship between regularity-rhythmicity and self-organization/isolation.
• Studied pathological conditions: thought blocks (auditory verbal hallucinations) and epileptic absences (spike-wave discharges).

Main Results:

• A common mode of coupling was found to significantly restrain the normal flow of mental processes.
• This aberrant connectivity mode eliminated spontaneous synchrony variability in conditions like thought blocks and absences.
• Functional specificity of brain sites was fixated, hindering information processing.

Conclusions:

• Sustained, common mode brain coupling acts as a significant impediment to cognitive function.
• Reduced synchrony variability, caused by aberrant connectivity, is a key mechanism underlying thought blocks and epileptic absences.
• Targeting and modulating this erroneous connectivity may offer therapeutic potential for related disorders.