• Since prestimulus EEG alpha activity has recently been considered to convey prestimulus top-down processing, we investigated whether prestimulus alpha activity reflects temporal expectancy of upcoming stimulation even under the non-classical contingent negative variation (CNV) paradigm. (elsevier.com)
  • The first aim of the present study was to examine the Contingent Negative Variation (CNV) amplitude and habituation pattern in a migraine sample versus non-migraine subjects, at the light of the MTHFR genotype, according to an unrelated and clinical based case-control panel. (cdc.gov)
  • The researchers also tested patients' contingent negative variation amplitude -- a measure of a person's overall ability to react to something by taking physical action. (thebody.com)
  • en] The identification of the brain structures and neurotransmitters responsible for the generation and/or modulation of the mismatch negativity (MMN) may contribute to a clearer understanding of its functional significance, and may have clinical implications. (ac.be)
  • Non-visual effects were evaluated based on brain arousal levels ( α -wave ratio and contingent negative variation [CNV]), autonomic nervous activity (heart rate variability [HRV]), work performance, and subjective responses during daytime exposure to either an artificial skylight or fluorescent lights, as well as nocturnal melatonin secretion. (biomedcentral.com)
  • Both, the initial and terminal contingent negative variation indicated a divergent pattern: participants with pronounced interpersonal deficits, showed increased cortical negativity to the CS+ compared to the CS−, whereas a reversed CS+/CS− differentiation was found in offenders scoring high on the antisocial facet. (frontiersin.org)
  • Task-appropriate preparation during executed and imagined movements was confirmed by electroencephalographic recording of a contingent negative variation waveform. (springer.com)
  • Differential Go/NoGo activity in both contingent negative variation and spectral power," PLoS One , vol. 7, no. 10, article e48504, 2012. (hindawi.com)
  • In other words, the CFs represent the context that accompany any healthcare treatment: the exposure of a patient to a positive context (positive CFs) very often produces a placebo effect that is the occurrence of symptoms improvement (e.g. analgesia), whereas a negative context (negative CFs) can generate a nocebo effect, with a worsening of the pain condition (e.g. hyperalgesia) [ 20 , 21 ]. (biomedcentral.com)
  • The contingent negative variation (CNV) was one of the first event-related potential (ERP) components to be described. (wikipedia.org)
  • It in no way shows or implies that the Transcendental Meditation technique has negative effects. (truthabouttm.org)
  • Previous patents have described "psychic energizer agents and compositions," the effects of which were assessed by a method referred to as Contingent Negative Variation (CNV). (cosmeticsandtoiletries.com)
  • The CFs directly impact on the quality of the therapeutic outcome: a positive context, that is a context characterized by the presence of positive CFs, can reduce pain by producing placebo effects, while a negative context, characterized by the presence of negative CFs, can aggravate pain by creating nocebo effects. (biomedcentral.com)