Characteristics of the Contingent Negative Variation During Lower Limb Functional Movement With an Audio-visual Cue
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Olsen, Sharon
Alder, Gemma
Rashid, Usman
Ghani, Usman
Boulle, Nadia
Signal, Nada
Taylor, Denise
Niazi, Imran Khan
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MDPI AG
Abstract
Background: The contingent negative variation (CNV) is a negative shift in electroencephalography (EEG) related to the planning and execution of an externally cued movement task. The CNV has the potential to be applied within stroke rehabilitation; however, there is insufficient knowledge about the CNV characteristics under movement conditions relevant to rehabilitation. This study explores the CNV characteristics during a functional movement task (versus a simple movement task) and when using an audio-visual cue that has been previously evaluated for its usability in stroke rehabilitation (versus a simple visual cue).
Methods: Thirty healthy participants performed five randomized movement tasks: simple ankle dorsiflexion with a visual cue (1), audio-visual cue (2), and auditory-only cue (3), and sit-to-stand with a visual (4) and audio-visual cue (5). Fifty repetitions of each movement were performed while continuous EEG was recorded. The band-passed and Laplacian-filtered (Cz) EEG was averaged for each condition and the peak negativity (PN) latency and amplitude were identified.
Results: PN latency was significantly later during sit-to-stand with the audio-visual cue versus the visual cue (p = 0.027). PN amplitude was significantly larger during sit-to-stand versus ankle dorsiflexion, with both visual and audio-visual cues (p < 0.0001).
Conclusion: The CNV changes under more complex movement conditions. Assumptions about the MRCP from simple laboratory recordings should not be generalized to the rehabilitation setting.
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Brain Disorders, Clinical Research, Rehabilitation, Bioengineering, Eye Disease and Disorders of Vision, Assistive Technology, Neurosciences
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Applied Sciences, ISSN: 2076-3417 (Print); 2076-3417 (Online), MDPI AG, 13(4), 2621-2621. doi: 10.3390/app13042621
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Except where otherwise noted, this item's license is described as Creative Commons Attribution CC-BY 4.0