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There exist studies which have introduced numerical methods that help determine consciousness level, isolating minimally conscious states from vegetative states.
Since electroencephalography is used to measure either current brain activity, or that recalled by an external stimulus, then clinical measures of consciousness can be done by means of EEG.
Although EEG provides a limited measurement of the channel of dynamics of the brain neurons, which is directly related to consciousness, it could be hypothetically possible that even a narrowed measurement channel would provide essential information.
The studies of the accurate architecture of brain systems involved in attention reveal that consciousness can be seen as a biological phenomenon, since it is considered to be particularly associated with animal nervous systems.
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