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E J Rzempoluck

Publications and source records attributed to E J Rzempoluck.

2 recordsLinked to original sources
PubMed1998

EEG changes index camouflaged object identification: a pilot study.

EEG correlates of camouflaged object identification were investigated in this pilot study by recording 8-s epochs of scalp potentials under two conditions. In the experimental condition subjects, three female and two male right-handers, aged 23-47, viewed images depicting camouflaged target objects, and signalled identification by blinking. In the control condition subjects viewed a neutral screen and blinked at will. Theta band activity was analysed for linear associations using cross-correlation. Correlation increased over a 1-s interval preceding. Associations included, progressively, occipital and left temporal regions, bilateral frontal and temporal areas, and bilateral occipital, temporal, central, frontal and prefrontal regions. A descriptive model is presented, according to which a unitary percept is the emergent result of a process of self-organisation of a network of interregional signalling.

Adult↗
PubMed1997

Neural network classification of EEG during camouflaged object identification.

A generalized regression neural network (GRNN) was trained to discriminate between EEGs recorded while subjects identified a camouflaged target object (picture condition) from EEGs recorded during a visually matched control task (control condition). In the picture condition subjects, three female and two male right handers, ages 23-47, viewed images depicting camouflaged target objects and signaled identification by blinking. In the control condition subjects viewed a neutral screen and blinked at will. EEGs made immediately preceding and following the blink were band-pass filtered at 2-8 Hz. The network achieved a marked increase in discriminability in the final 250 ms preceding target identification, with chance level of discrimination before and after. Network performance using scrambled data was also at chance level.

Adult↗