Affective pictures processing is reflected by an increased long-distance EEG connectivity.
Güntekin. Bahar B; Femir. Banu B; Gölbaşı. Bilge Turp BT; Tülay. Elif E; Başar. Erol E
Key Findings
- Unpleasant pictures increase delta and theta EEG coherence compared to neutral pictures.
- Women exhibit higher delta and theta coherence than men, especially during emotional picture viewing.
- Overall brain connectivity is greater during emotional (valence/arousal) picture perception than during neutral picture viewing.
Practical Outcomes
- The findings are purely neuroscientific and do not provide actionable advice for longevity, metabolic health, or performance optimization. They have no direct relevance to using or dosing selank, so they offer no practical protocols for the biohacker community.
Summary
This study looked at how people’s brains connect across long distances when they view emotional pictures, using EEG recordings. It found that unpleasant images boost certain brain wave connections more than neutral ones, and women tend to show stronger connectivity than men during emotional processing. The research does not involve the peptide selank or suggest any health‑related actions.
Abstract
Analysis of affective picture processing by means of EEG has invaded the literature. The methodology of event-related EEG coherence is one of the essential methods used to analyze functional connectivity. The aims of the present study are to find out the long range EEG connectivity changes in perception of different affective pictures and analyze gender differences in these long range connected networks. EEGs of 28 healthy subjects (14 female) were recorded at 32 locations. The participants passively viewed emotional pictures (IAPS, unpleasant, pleasant, neutral). The long-distance intra-hemispheric event-related coherence was analyzed for delta (1-3.5 Hz), theta (4-7.5 Hz), and alpha (8-13 Hz) frequency ranges for F<sub>3</sub>-T<sub>7</sub>, F<sub>4</sub>-T<sub>8</sub>, F<sub>3</sub>-TP<sub>7</sub>, F<sub>4</sub>-TP<sub>8</sub>, F<sub>3</sub>-P<sub>3</sub>, F<sub>4</sub>-P<sub>4</sub>, F<sub>3</sub>-O<sub>1</sub>, F<sub>4</sub>-O<sub>2</sub>, C<sub>3</sub>-O<sub>1</sub>, C<sub>4</sub>-O<sub>2</sub> electrode pairs. Unpleasant pictures elicited significantly higher delta coherence values than neutral pictures (<i>p</i> < 0.05), over fronto-parietal, fronto-occipital, and centro-occipital electrode pairs. Furthermore, unpleasant pictures elicited higher theta coherence values than pleasant (<i>p</i> < 0.05) and neutral pictures (<i>p</i> < 0.05). The present study showed that female subjects had higher delta (<i>p</i> < 0.05) and theta (<i>p</i> < 0.05) coherence values than male subjects. This difference was observed more for emotional pictures than for neutral pictures. This study showed that the brain connectivity was higher during emotional pictures than neutral pictures. Females had higher connectivity between different parts of the brain than males during emotional processes. According to these results, we may comment that increased <i>valence</i> and <i>arousal</i> caused increased brain activity. It seems that not just single sources but functional networks were also activated during perception of emotional pictures.
Study Information
pubmed
2017
2017-04-13T00:00:00.000Z
10.1007/s11571-017-9439-z
37
67