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P36.14 Angry face expression induces occipital θ and α oscillations
| Content Provider | Semantic Scholar |
|---|---|
| Author | Güntekin, Bahar Baþar, E. |
| Copyright Year | 2006 |
| Abstract | Background: The effects of the smell and taste stimulations are known from functional magnetic resonance imaging (fMRI) and electroencephalographic (EEG) studies. They have shown that the caudal orbitofrontal cortex, amygdala, insular cortex and anterior cingulate are activated by both modalities. Linear EEG investigations in time and frequency domain showed power and coherency changes in the alpha as well as theta bands depending on the quality of the stimulation. Only some analyses of non-linear nature were found. Aim/objective: Of the present study was to investigate the short term effects of an acute smell and taste stimulation in healthy adult volunteers by the PD2 analysis of Skinner and Molnar. Methods: Nine persons (seven females, two males) with an average age of 49 ± 19 years participated in the examination. Sixty seconds of 16 channel EEGs – according to 10/20 system – were recorded by an EEG 16X equipment and digitized by a LI-01/A interface (Mikromed) at a rate of 256 sample/s. After the first 30 s which was taken as a basal period for the comparison a fresh perfume cap or a piece of milk chocolate was presented. The period after the stimulation was divided in two 15 sec long parts and their PD2 results were compared to the basal condition by non-parametric signed rank test of Wilcoxon. Results: it was found that there was a significant decrease in the average of the PD2 after the olfactory stimulation on both sides. A short lasting about 15 s long decrease was found in the F3, O1 and C4 leads. Longer decreases have appeared in the F7, T4, P4 leads and the SD values decreased around the above mentioned positions. The effects after gustatory stimulation were less pronounced and late. Significant decrease of the average PD2 was found only in the right side, on the C4 and O2 leads. Conclusion: it is concluded that the PD2 analysis of the EEGs looks suitable for finding differences in the data processing after olfactory and gustatory stimulation. |
| Starting Page | 182 |
| Ending Page | 183 |
| Page Count | 2 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.clinph.2006.06.624 |
| Alternate Webpage(s) | https://api.elsevier.com/content/article/pii/S1388245706008856 |
| Alternate Webpage(s) | https://www.sciencedirect.com/science/article/pii/S1388245706008856?dgcid=api_sd_search-api-endpoint |
| Alternate Webpage(s) | https://doi.org/10.1016/j.clinph.2006.06.624 |
| Volume Number | 117 |
| Journal | Clinical Neurophysiology |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
