contingent negative variation

contingent negative variation
(CNV) a small negative potential recorded on an electroencephalogram over the front central scalp of some subjects who perform tasks requiring close attention or who have just received a warning stimulus. Called also E wave and expectancy wave.

Medical dictionary. 2011.

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  • Contingent negative variation — The contingent negative variation (CNV) was one of the first event related potential (ERP) components to be described. The CNV component was first described by Dr. W. Grey Walter and colleagues in an article published in Nature in 1964.[1] The… …   Wikipedia

  • E wave — contingent negative variation …   Medical dictionary

  • expectancy wave — contingent negative variation …   Medical dictionary

  • Bereitschaftspotential — In neurology, the Bereitschaftspotential or BP (from German, readiness potential ), also called the pre motor potential or readiness potential (RP), is a measure of activity in the motor cortex of the brain leading up to voluntary muscle movement …   Wikipedia

  • William Grey Walter — Infobox Scientist name = William Grey Walter box width = image width = 150px caption = William Grey Walter birth date = February 19, 1910 birth place = Kansas City, Missouri death date = May 06, 1977 death place = residence = citizenship =… …   Wikipedia

  • attention — attentional, adj. n. /euh ten sheuhn/; interj. /euh ten shun /, n. 1. the act or faculty of attending, esp. by directing the mind to an object. 2. Psychol. a. a concentration of the mind on a single object or thought, esp. one preferentially… …   Universalium

  • CNV — choroidal neovascularization; contingent negative variation; cutaneous necrotizing vasculitis * * * contingent negative variation …   Medical dictionary

  • Mismatch negativity — Mismatch field and MMNM redirect here. The mismatch negativity (MMN) or mismatch field (MMF) is a component of the event related potential (ERP) to an odd stimulus in a sequence of stimuli. It arises from electrical activity in the brain and is… …   Wikipedia

  • P3b — The P3b is a subcomponent of the P300, an event related potential (ERP) component that can be observed in human scalp recordings of brain electrical activity. The P3b is a positive going amplitude (usually relative to a reference behind the ear… …   Wikipedia

  • N400 (neuroscience) — The N400 is a component of time locked EEG signals known as event related potentials (ERP). It is a negative going deflection that peaks around 400 milliseconds post stimulus onset, although it can extend from 250 500 ms, and is typically maximal …   Wikipedia

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