Stability of steady-state visual evoked potential contrast response functions.
Psychophysiology
; 61(1): e14412, 2024 Jan.
Article
em En
| MEDLINE
| ID: mdl-37614220
ABSTRACT
Repetitive sensory stimulation has been shown to induce neuroplasticity in sensory cortical circuits, at least under certain conditions. We measured the plasticity-inducing effect of repetitive contrast-reversal-sweep steady-state visual-evoked potential (ssVEP) stimuli, hoping to employ the ssVEP's high signal-to-noise electrophysiological readout in the study of human visual cortical neuroplasticity. Steady-state VEP contrast-sweep responses were measured daily for 4 days (four 20-trial blocks per day, 20 participants). No significant neuroplastic changes in response amplitude were observed either across blocks or across days. Furthermore, response amplitudes were stable within-participant, with measured across-block and across-day coefficients of variation (CV = SD/mean) of 15-20 ± 2% and 22-25 ± 2%, respectively. Steady-state VEP response phase was also highly stable, suggesting that temporal processing delays in the visual system vary by at most 2-3 ms across blocks and days. While we fail to replicate visual stimulation-dependent cortical plasticity, we show that contrast-sweep steady-state VEPs provide a stable human neurophysiological measure well suited for repeated-measures longitudinal studies.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Córtex Visual
/
Potenciais Evocados Visuais
Tipo de estudo:
Observational_studies
Limite:
Humans
Idioma:
En
Revista:
Psychophysiology
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Estados Unidos