What question did this study set out to answer?

To investigate whether changes in cortical information transmission and effective connectivity account for the fading of consciousness during sleep.

September 29, 2005Science

Breakdown of Cortical Effective Connectivity During Sleep

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Authors

MMMarcello MassiminiUniversity of Milan FFFabio FerrarelliUniversity of Pittsburgh RHReto HuberUniversity of Zurich

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Implication

Neurophysiological study demonstrates impaired cortical signal propagation during non-rapid eye movement sleep, suggesting consciousness fades due to broken effective connectivity.

Key Points

To investigate whether changes in cortical information transmission and effective connectivity account for the fading of consciousness during sleep.
Applied transcranial magnetic stimulation to the premotor cortical area.
Tracked signal transmission and propagation across the brain using high-density electroencephalography during quiet wakefulness and non-rapid eye movement sleep.
During quiet wakefulness, an initial response at approximately 15 milliseconds triggered traveling waves that propagated to connected cortical areas several centimeters away.
During non-rapid eye movement sleep, the initial cortical response was stronger but was rapidly extinguished and failed to propagate beyond the stimulation site.

Cite This Study

Massimini et al. (2005) studied this question.

synapsesocial.com/papers/69deecea40ea065679559ca5 https://doi.org/10.1126/science.1117256

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Implication

Neurophysiological study demonstrates impaired cortical signal propagation during non-rapid eye movement sleep, suggesting consciousness fades due to broken effective connectivity.

Breakdown of Cortical Effective Connectivity During Sleep

Discussion

Member takes

Implication

Key Points

Cite This Study

Breakdown of Cortical Effective Connectivity During Sleep

Discussion

Member takes

Implication

Key Points

Cite This Study

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