PL EN


Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
2019 | 79 | Suppl.1 |

Tytuł artykułu

Assessment of biomarkers of attention in modified delay match-to-sample test

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
INTRODUCTION: Information processing and stimuli filtering mechanisms are dispersed over many networks engaged in different processes and located all over the brain. In the present study, we examined neural correlates of attention-related working memory during the repeated modified delay match‑to‑sample test (DMTS). AIM(S): To find the most effective analytical method for assessment of attention related activity to be used in neurofeedback training. METHOD(S): In order to identify neuronal activity underlying state of increased attention, we used a DMTS test amended by control trials that did not require the engagement of attention and memory. These additional trials allowed us to compare the impact of attended versus passive conditions on electrical brain activity. We examined 14 subjects in 3 sessions performed within 10‑20 days. EEG was collected with 21 electrodes in the 10‑20 system. For each electrode channel and trial in selected time windows, we analyzed power in consecutive frequency bands (<40 Hz) and signal complexity measures, including sample entropy, Shannon entropy, and Higuchi fractal dimension (HFD). RESULTS: The results averaged over the whole group showed significant differences between EEG signals recorded during attentional and control trials on several electrodes. However, at the level of individual subjects, the selection of signals with such differences varied between subjects and applied methods. The most prominent effect of attention was observed in a window extracted from the 5-sec period of stimulus expectation and information retention, not accompanied by sample of the object. With repetition of DMTS sessions, the effect of differentiation of attentional and controls trials has been also emphasized in all analyzed measures. CONCLUSIONS: The results indicated the importance of the individual subject and session analysis and relevance of applying signal complexity methods to support spectral analysis in a further application.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

79

Numer

Opis fizyczny

p.LXI

Twórcy

autor
  • Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
  • Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
autor
  • Institute of Philosophy, University of Warsaw, Warsaw, Poland
  • World Hearing Center, Institute of Physiology and Pathology of Hearing, Kajetany, Poland
autor
  • Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland

Bibliografia

Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

bwmeta1.element.agro-ccefe737-c1b3-40c0-8991-81371efce2f5
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.