Biomaterial Database

[Contingent negative variation (CNV) as presaccadic potential]. 1992

M Nomura

Department of Ophthalmology, School of Medicine, Keio University, Shinjuku-ku, Japan.

By recording contingent negative variation (CNV) with saccade as the response, EEGs were recorded before, during and after saccade. Light-emitting diodes (LEDs) were used as the warning stimulus (S1) and the imperative stimulus (S2), and a different electrode was placed on Cz according to the international 10-20 system. Evoked potentials were amplified by a D.C. amplifier and 16 responses were averaged. EOGs were recorded simultaneously. There were no remarkable changes in CNV according to the S1-S2 interval or angle of saccade. A positive wave of approximately 10 microV was observed prior to saccade, and was not believed to be the influence of either EOG or blinking. This positive wave may be similar to the spike potential in presaccadic potentials or may be a component of postimperative negative variation (PINV).

UI	MeSH Term	Description	Entries
D008297	Male		Males
D003265	Contingent Negative Variation	A negative shift of the cortical electrical potentials that increases over time. It is associated with an anticipated response to an expected stimulus and is an electrical event indicative of a state of readiness or expectancy.	Bereitschaftspotential,Readiness Potential,Bereitschaftspotentials,Contingent Negative Variations,Potential, Readiness,Potentials, Readiness,Readiness Potentials,Variation, Contingent Negative,Variations, Contingent Negative
D004569	Electroencephalography	Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain.	EEG,Electroencephalogram,Electroencephalograms
D004585	Electrooculography	Recording of the average amplitude of the resting potential arising between the cornea and the retina in light and dark adaptation as the eyes turn a standard distance to the right and the left. The increase in potential with light adaptation is used to evaluate the condition of the retinal pigment epithelium.	EOG,Electrooculograms,Electrooculogram
D005074	Evoked Potentials, Visual	The electric response evoked in the cerebral cortex by visual stimulation or stimulation of the visual pathways.	Visual Evoked Response,Evoked Potential, Visual,Evoked Response, Visual,Evoked Responses, Visual,Potential, Visual Evoked,Potentials, Visual Evoked,Response, Visual Evoked,Responses, Visual Evoked,Visual Evoked Potential,Visual Evoked Potentials,Visual Evoked Responses
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults
D012438	Saccades	An abrupt voluntary shift in ocular fixation from one point to another, as occurs in reading.	Pursuit, Saccadic,Saccadic Eye Movements,Eye Movement, Saccadic,Eye Movements, Saccadic,Movement, Saccadic Eye,Movements, Saccadic Eye,Pursuits, Saccadic,Saccade,Saccadic Eye Movement,Saccadic Pursuit,Saccadic Pursuits