136296 20260217205525.0 doi 10.1016/j.bbr.2024.115140 sideral 139236 ART-2024-139236 eng Pérez, Vanesa Individual posterior alpha rhythms and cognitive reserve as possible early prognostic markers in people with subjective memory complaints 2024 Access copy available to the general public Unrestricted Subjective memory complaints (SMCs) are a memory disorder that often precedes mild cognitive impairment (MCI) or Alzheimer’s disease (AD). Both individual alpha rhythms and cognitive reserve (CR) represent key features of SMCs and provide useful tools to characterize and predict the course of the disorder. We studied whether older people with SMCs may also present some abnormal resting state electroencephalogram (rsEEG) alpha rhythms, and whether alpha rhythms are associated with CR. To do this, eyes-closed rsEEG were recorded in 68 older people with and without SMCs. The individual alpha indexes alpha/theta transition frequency (TF) and individual alpha frequency peak (IAFp) were computed. TF and IAFp were also used to determine the alpha1, alpha2, and alpha3 power frequency. Results indicated no differences in TF or IAFp between older people with SMCs and controls. The SMCs group showed a reduction in alpha3 power in comparison with controls. Specifically, women with SMCs were characterized by a significant decrease in alpha3 power compared to control women. Furthermore, only in SMCs group, greater CR was associated with slow IAFp. In sum, these results suggest that TF and IAFp are two stable indexes that are not influenced by the presence of SMCs. However, the reduction in alpha3, as observed in women with SMCs, shows an abnormal posterior rsEEG at alpha power. Finally, the compensatory mechanisms of CR appear to interact with the neurophysiological mechanisms that underlie the regulation of alpha rhythms. Info:eu-repo/grantAgreement/ES/AEI/PID2020-119406GB-I00 info:eu-repo/grantAgreement/ES/DGA/S31-23R info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 2.3 2024 BEHAVIORAL SCIENCES 21 / 57 = 0.368 2024 Q2 T2 NEUROSCIENCES 213 / 314 = 0.678 2024 Q3 T3 0.919 2024 Behavioral Neuroscience 2024 Q2 5.5 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Hidalgo, Vanesa Universidad de Zaragoza (orcid)0000-0003-3920-1099 Salvador, Alicia 4009 725 Universidad de Zaragoza Dpto. Psicología y Sociología Área Psicobiología 471 (2024), 115140 [7 pp.] Behav. brain res. Behavioural brain research 0166-4328 1494310 http://zaguan.unizar.es/record/136296/files/texto_completo.pdf Versión publicada 2620285 http://zaguan.unizar.es/record/136296/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:136296 articulos driver 2026-02-17-20:30:22 ARTICLE