RT info:eu-repo/semantics/article
T1 Relation between EEG resting-state power and modulation of P300 task-related activity in theta band in schizophrenia
A1 Iglesias Tejedor, María
A1 Díez Revuelta, Álvaro
A1 Llorca Bofí, Vicent
A1 Núñez Novo, Pablo
A1 Castaño Díaz, Carolina
A1 Bote, Berta
A1 Segarra, Rafael
A1 Sanz Fuentenebro, Javier
A1 Molina Rodríguez, Vicente
K1 Schizophrenia
K1 Esquizofrenia
K1 Spectral entropy
K1 Entropía espectral
K1 Theta bands
K1 Ondas theta
K1 3205.07 Neurología
K1 3211 Psiquiatría
AB There is some consistency in previous EEG findings that patients with schizophrenia have increased resting-state cortical activity. Furthermore, in previous work, we have provided evidence that there is a deficit in the modulation of bioelectrical activity during the performance of a P300 task in schizophrenia. Our hypothesis here is that a basal hyperactivation would be related with altered ability to change or modulate cortical activity during a cognitive task. However, no study so far, to the best of our knowledge, has studied the association between resting-state activity and task-related modulation. With this aim, we used a dual EEG paradigm (resting state and oddball task for elicitation of the P300 evoked potential) in a sample of patients with schizophrenia (n = 100), which included a subgroup of patients with first episode psychosis (n = 30), as well as a group of healthy controls (n = 93). The study measures were absolute power for resting-state; and spectral entropy (SE) and connectivity strength (CS) for P300-task data, whose modulation had been previously found to be altered in schizophrenia. Following the literature on P300, we focused our study on the theta frequency band. As expected, our results showed an increase in resting state activity and altered task-related modulation. Moreover, we found an inverse relationship between the amount of resting-state activity and modulation of task-related activity. Our results confirm our hypothesis and support the idea that a greater amount of resting theta-band synchrony could hamper the modulation of signal regularity (quantified by SE) and activity density (measured by CS) during the P300 task performance. This association was found in both patients and controls, suggesting the existence of a common mechanism and a possible ceiling effect in schizophrenia patients in relation to a decreased inhibitory function that limits their cortical reactivity to the task.
PB Elsevier
SN 0278-5846
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/52206
UL https://uvadoc.uva.es/handle/10324/52206
LA eng
NO Progress in Neuro-Psychopharmacology and Biological Psychiatry, 2022, vol. 116, 110541
NO Producción Científica
DS UVaDOC
RD 24-nov-2024