Abstract
BACKGROUND/OBJECTIVE: The electroencephalogram (EEG) is the process of recording electrical potentials produced by neurons in the brain. For understanding the neuro-physiological
mechanism of various cognitive and neurological disorders, EEG has been proved a vital technique for many years. The change blindness which is incapability of brain to notice substantial
visual changes is among such disorders. This study investigates the complexity in information
process of EEG signals during the change blindness disorder using the two different measures
called entropy and correlation dimension functions.
METHODS: The EEG data of change blindness disorder was recorded from 22 subjects while
they were performing change detection and change blindness trials for two types of stimuli.
These were (1) single stimulus followed by another matching stimulus, (2) single stimulus followed by another non-matching stimulus. The measure of complexity in recorded EEG was estimated using both correlation dimension and approximate entropy functions.
RESULTS: The results have shown significant decrease in values of approximate entropy and
correlation dimension at frontal position of electrodes for change blindness trials.
CONCLUSION: The neurophysiological implication of these results provide the possibility that
the increase of brain complexity, which can be interpreted as increase of information process
and integration, was not sustained in frontal position of brain during the change blindness disorder.
Irfan Ali Memon, Mohan Lal Luhano, Moin Ansari. (2012) Electroencephalography Changes during Change Blindness Disorder , Journal of Liaquat University of Medical and Health Sciences, Volume-11, Issue-3.
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