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Biomedical subjects

B G Breitmeyer

Publications and source records attributed to B G Breitmeyer.

29 records · Page 2Linked to original sources
PubMed1981

Metacontrast investigations of sustained-transient channel inhibitory interactions.

The metacontrast paradigm was exploited to study possible inhibitory interactions between sustained and transient channels. Variations and measures of target disinhibition or target recovery. The former type of target recovery is taken as evidence for interchannel sustained-on-transient inhibition; the latter, as evidence for intrachannel transient-on-transient inhibition.

Discrimination Learning↗
PubMed1981

Backward masking by pattern stimulus offset.

The backward masking effects of the offset of a pattern stimulus on the apparent contrast of a target stimulus were determined to be a function of target onset-mask offset asynchrony. With spatially overlapping stimuli and binocular viewing, a monotonic function similar to that characterizing early dark adaptation was obtained; with a dichoptically presented disk onset as target and a surrounding ring offset as mask, a typical U-shaped metacontrast effect as a function of target onset-mask offset asynchrony was obtained. These mask-offset effects are related to the possible roles of (a) peripheral "off" mechanisms and (b) central metacontrast mechanisms in terminating visual response persistence in sustained channels.

Discrimination Learning↗
PubMed1979

Local foveal inhibitory effects of global peripheral excitation.

Global excitation produced by oscillating a peripheral square-wave grating back and forth through one-half cycle inhibits the visibility of an incremental test flash only when the flash is presented in the foveal region of the visual field. This finding is discussed in the context of the neurophysiological periphery effect and shift-effect and their possible role in saccadic suppression.

Eye Movements↗