Analysis of the functional EEG network in an Ecuadorian schizophrenia sample
- Alberto Rodríguez-Lorenzana 1
- Mabel Torres-Tapia 1
- Cesar Parra 1
- Álvaro Díez 2
- Antonio Arjona 2
- Javier Gomez-Pilar 3
- Erika Pasquel 4
- Diego Granizo 5
- Vicente Molina 6
- 1 Escuela de Psicología, Universidad de Las Américas. Quito, Ecuador
- 2 Psychiatry Department, School of Medicine, University of Valladolid, Valladolid, Spain
- 3 Biomedical Engineering Group, University of Valladolid. Valladolid. Spain
- 4 San Juan de Dios Specialized Hospital, Quito. Ecuador
- 5 Sacred Heart Psychiatric Institute. Quito. Ecuador
- 6 Psychiatry Service, Clinical Hospital of Valladolid/ Psychiatry Department, School of Medicine, University of Valladolid/Neurosciences Institute of Castilla y León (INCYL), School of Medicine, University of Valladolid. Valladolid. Spain
ISSN: 0213-6163
Año de publicación: 2021
Volumen: 35
Número: 4
Páginas: 216-224
Tipo: Artículo
Otras publicaciones en: European journal of psychiatry
Resumen
Background and objectives Higher mental functions depend on global functional coordination of the brain. Our aim was to study the baseline condition and modulation of functional networks in a previously unevaluated clinical population, compare the results with a population from another country, and analyze their relationship with cognitive functioning. Methods We evaluated the functioning of brain networks by EEG in 24 patients with schizophrenia and 32 healthy Ecuadorian controls. EEG recordings were made at rest and while performing a P300 task. Small world (SW), Path Length (PL), clustering coefficient (CLC) and connective strength (CS) values were calculated in both conditions. The values obtained were compared between groups, with the results of Spanish patients, and the relationship between the connective parameters and the cognitive performance of the participants was analyzed. Results Higher PL, CLC and CS values were identified in patients diagnosed with schizophrenia compared to controls (in basal condition) and lower SW values in this same condition. Ecuadorian patients obtained higher values than Spanish patients in the PL and CLC parameters and lower values for the SW parameter, despite these differences, the pattern of alteration in both samples followed the same trend. Finally, the alteration of CS, SW, CLC and PL parameters at baseline was related to cognitive performance. Conclusion The connective alterations identified in Ecuadorian schizophrenic patients are consistent with those found in another sample with different genetic, environmental and cultural conditions. In addition, these alterations were associated with worse performance in different cognitive domains.