Temat: DTF - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Dlaczego już po jednej sesji wysiłku fizycznego czujemy się lepiej? Mózgowy mechanizm poprawy nastroju jako wynik zmian w komunikacji korowej
Why we feel better after just one session of physical exercise? Brain mechanism of mood improvement as a result of changes in cortical connectivity
Autorzy:: Nowak, Izabela
Opis:: The aim of this study was to examine whether a single session of physical exercise benefits mood and affects interaction between dorsolateral prefrontal cortex (associated with affective control) and temporal regions (affective cortical areas), which was estimated by Directed Transfer Function (DTF, an EEG effective connectivity method). In three testing sessions took part 18 male adults in a counterbalanced and randomized order: moderate-intensity continuous exercise, high-intensity interval exercise and seated rest condition. During each session, participants cycled on a stationary ergometer for 24 minutes. Before and after an exercise protocol the 3 minutes of resting state EEG was recorded. The results show a significant increase in communication flow from prefrontal lobe to temporal regions, after both sessions of exercise in comparison to seated rest condition. The study suggests that changes in effective connectivity might underlie mood improvement after a physical exercise.
Celem powyższego badania było sprawdzenie, czy pojedyncza sesja wysiłku fizycznego poprawia nastrój oraz wpływa na interakcję pomiędzy grzbietowo-boczną korą przedczołową (odpowiedzialną za kontrolę afektywną) oraz obszarami skroniowymi (uczestniczącymi w korowych procesach afektywnych), co oszacowano za pomocą Skierowanej Funkcji Przenoszenia (DTF, metoda badania łączności efektywnej EEG). W trzech sesjach eksperymentalnych wzięło udział 18 młodych mężczyzn w losowej i zrównoważonej kolejności: wysiłek o umiarkowanej intensywności, wysiłek interwałowy o wysokiej intensywności i brak wysiłku. Podczas każdej sesji uczestnicy pedałowali na stacjonarnym ergometrze przez 24 minuty. Przed i po każdym protokole eksperymentalnym rejestrowano 3-minutowy zapis EEG spoczynkowego. Wyniki wykazały istotny wzrost w przepływie informacji pomiędzy korą przedczołową a obszarami skroniowymi po obu rodzajach wysiłku w porównaniu z jego brakiem. Badanie sugeruje, że zmiany w efektywnej łączności korowej mogą leżeć u podłoża poprawy nastroju po wysiłku fizycznym.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Inne

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Skocz do pozycji: 2.

Tytuł:: Spectroscopic characteristics of FeI-phthalocyanine
Autorzy:: Kaczmarzyk, T.
Jackowski, T.
Dziliński, K.
Tematy:: iron phthalocyanine
reduction process
Mössbauer spectroscopy
EPR
DTF; Pokaż więcej
Wydawca:: Instytut Chemii i Techniki Jądrowej
Powiązania:: https://bibliotekanauki.pl/articles/148333.pdf Link otwiera się w nowym oknie
Opis:: Results of Mössbauer and EPR study of a univalent-iron phthalocyanine complex (FeIPc) are presented in this paper. FeIPc has been obtained from FeIIPc by the chemical reduction method in tetrahydrofuran (THF) and dimethoxyethan (DME) solutions. Like in the case of FeI-porphyrin complexes, Mössbauer and EPR data as well as quantum calculations of electronic absorption spectra confirm in this case a low-spin configuration of FeI ions with an unpaired electron located at dz2 orbital. Interaction between FeIPc and THF molecules does not change significantly the electron configuration of FeI ions coordinated to phthalocyanine ligand.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: DNA structure change induced by guanosine radicals : a theoretical and spectroscopic study of proton radiation damage
Autorzy:: Kobierski, Jan
Lipiec, Ewelina
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 4.

Tytuł:: Directed flow of beta band communication during reorienting of attention within the dorsal attention network
Autorzy:: Capotosto, Paolo
Spadone, Sara
Corbetta, Maurizio
Della Penna, Stefania
Wyczesany, Mirosław
Opis:: Background: The endogenous allocation of spatial attention to selected environmental stimuli is controlled by prefrontal (frontal eye fields [FEFs]) and parietal (superior parietal lobe [SPL] and intraparietal sulcus [IPS]) regions belonging to the dorsal attention network (DAN) with a subdivision in subsystems devoted to reorienting (or shifting) of attention between locations (SPL) or maintaining attention at contralateral versus ipsilateral locations (ventral IPS [vIPS]). Although previous studies suggested a leading role of prefrontal regions over parietal sites in orienting attention, the spectral signature of communication flow within the DAN for different attention processes is still debated. Methods: We used the directed transfer function (DTF) on magnetoencephalography (MEG) data to examine the causal interaction between prefrontal and parietal regions of the DAN when subjects shifted versus maintained attention to a stream of cued visual stimuli. Results: In the beta band, we found that shift versus stay cues induced stronger connectivity (DTF values) from right FEF to right SPL, in the early phase of reorienting. Conversely, when considering stay versus shift cues, an increase of DTF values and stronger directionality was observed between bilateral vIPS and from right vIPS to FEF. Similar analyses carried out in theta, alpha, and gamma showed no significant frontoparietal increases of DTF for shift versus stay cues, whereas the stay-related increase of DTF observed in beta between ventral parietal areas was preserved in the alpha band. Conclusions: These findings suggest that control processes in DAN regions (in particular between FEF and SPL) can be associated to a beta frequency channel during shift of attention. Impact statement In the present study, we compared the reorienting response to novel stimuli with respect to maintaining response. Results provided new insights into understanding the neural mechanisms of control attention processes by identifying the frequency-specific causal interactions between frontal and parietal regions belonging to the dorsal attention network supporting spatial reorienting response.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 5.

Tytuł:: Acute aerobic exercise enhances cortical connectivity between structures involved in shaping mood and improves self-reported mood : an EEG effective-connectivity study in young male adults
Autorzy:: Wyczesany, Mirosław
Szyguła, Zbigniew
Nowak, Izabela
Maciejczyk, Marcin
Ligęza, Tomasz
Opis:: There seems to be a general consensus among researchers that acute aerobic exercise (exercise hereafter) improves mood, but the neural mechanisms which drive these effects are far from being clear. The current study investigated the cortical connectivity patterns that underlie changes in mood after exercise. Twenty male adults underwent three different experimental protocols that were carefully controlled in terms of underlying metabolism and were administered in a randomized order: moderate-intensity continuous exercise, high-intensity interval exercise, and seated rest condition. Before and after each experimental protocol, we collected data on the participants' mood using the UMACL questionnaire and recorded their resting-state EEG. We focused on the effective connectivity patterns exerted by the dorso-lateral prefrontal cortex (dlPFC) over the temporal region (TMP), as these are important cortical structures involved in shaping mood. The cortical connectivity patterns in the resting-state EEG were evaluated using the directed transfer function (DTF), which is an autoregressive effective connectivity method. The results showed that both moderate-intensity exercise and high-intensity interval exercise improved participants' self-reported mood. Crucially, this improvement was accompanied by stronger influences of dlPFC over TMP. The observed changes in the effective connectivity patterns between dlPFC and TMP might help to better understand the effects of exercise on mood.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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