A new system for gray-level surface distribution maps of electrical activity

Buchsbaum, Monte S.; Rigal, François; Coppola, Richard; Cappelletti, J.; King, C. T. G.; Johnson, J.

doi:10.1016/0013-4694(82)90029-3

Cited by 143 publications

(23 citation statements)

References 12 publications

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“…poral amplitude we observed is not merely due to the use of a linked ear reference close to temporal leads. We have previously noted very similar delta activity distributions with ear and average reference methods (Buchsbaum et al 1982a). …”

Section: Discussionmentioning

confidence: 67%

Topographic EEG changes with normal aging and SDAT

Breslau

Starr

Sicotte

et al. 1989

Electroencephalography and Clinical Neurophysiology

155

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Section: Discussionmentioning

confidence: 67%

Topographic EEG changes with normal aging and SDAT

Breslau

Starr

Sicotte

et al. 1989

Electroencephalography and Clinical Neurophysiology

155

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“…In the present study we observed two different poten- The maps were computed on the basis of an interpolation algorithm assigning a voltage to a given location that is the average of the voltages recorded from the six nearest electrode leads, linearly weighted by distance from the location at stake (Buchsbaum et al, 1982). Each component is shown for a point in time corresponding to its peak latency as observed under the high Filehne illusion condition.…”

Section: Discussionmentioning

confidence: 86%

An Electrophysiological Correlate of Visual Motion Awareness in Man

Haarmeier

Thier

1998

Journal of Cognitive Neuroscience

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Abstractn It is usually held that perceptual spatial stability, despite smooth pursuit eye movements, is accomplished by comparing a signal re ecting retinal image slip with an internal reference signal, encoding the eye movement. The important consequence of this concept is that our subjective percept of visual motion re ects the outcome of this comparison rather than retinal image slip. In an attempt to localize the cortical networks underlying this comparison and therefore our subjective percept of visual motion, we exploited an imperfection inherent in it, which results in a movement illusion. If smooth pursuit is carried out across a stationary background, we perceive a tiny degree of illusionary background motion (Filehne illusion, or FI), rather than experiencing the ecologically optimal percept of stationarity. We have recently shown that this illusion can be modi ed substantially and predictably under laboratory conditions by visual motion unrelated to the eye movement. By making use of this nding, we were able to compare cortical potentials evoked by pursuit-induced retinal image slip under two conditions, which differed perceptually, while being identical physically. This approach allowed us to discern a pair of potentials, a parieto-occipital negativity (N300) followed by a frontal positivity (P300), whose amplitudes were solely determined by the subjective perception of visual motion irrespective of the physical attributes of the situation. This nding strongly suggests that subjective awareness of visual motion depends on neuronal activity in a parietooccipito-frontal network, which excludes the early stages of visual processing. n

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“…11 cps; beta, 13.68-19.95 cps. Continuous surface density maps of the entire scalp surface were created from these values, using a 4-nearest neighbor interpolation algorithm (22).…”

Section: Methodsmentioning

confidence: 99%