Änderungen

*Henz, D. (2019, September). ULTRASOUND STIMULATION ON THE SKIN STIMULATES EEG THETA ACTIVITY IN SPEECH-RELATED BRAIN AREAS. In PSYCHOPHYSIOLOGY, POSTER 2-072 (Vol. 56, pp. S85-S85). 111 RIVER ST, HOBOKEN 07030-5774, NJ USA: WILEY.

*Henz, D. (2019, September). ULTRASOUND STIMULATION ON THE SKIN STIMULATES EEG THETA ACTIVITY IN SPEECH-RELATED BRAIN AREAS. In PSYCHOPHYSIOLOGY, POSTER 2-072 (Vol. 56, pp. S85-S85). 111 RIVER ST, HOBOKEN 07030-5774, NJ USA: WILEY.

* Diana Henz  University of MainzSELECTIVE STIMULATION OF EEG THETA, ALPHA, AND BETA ACTIVITY BY A FREQUENCY- BASED THERAPEUTICAL APPROACH, Descriptors: frequency- based therapy, EEG, alpha power Effects of brain stimulation on brain activity, cognitive functions and the mental state have been studied extensively. To date, less is known on the effects of frequency- based therapeutical approaches that do not use transcranial electrical or magnetic stimulation but rely on application of natural frequencies. In the present study, we investigated the effects of the frequencybased therapeutical approach Colorbox12 that uses application of distinct sequences of colors and natural auditive frequencies on EEG brain activity and the mental state. Subjects were exposed to distinct frequencies in three experimental conditions (theta, alpha, beta), and one control condition (no frequency) by using the Colorbox12 system. High- density EEG was recorded continuously from 128 electrodes before, during, and after each experimental condition. Each experimental condition was tested for 10 minutes. Results on spontaneous EEG showed increased overall alpha power during and after application of the alpha frequency with subjects reporting increased relaxation. Overall theta and alpha activity increased when the theta frequency was applied. Here, subjects reported increased relaxation. Beta activity increased in frontal areas during application of the beta frequency with subjects reporting increased wakefulness and concentration. We discuss the results and possible fields of application in terms of activation of distinct neural circuits by application of the frequency- based therapeutical approach tested in the present study.

*Diana Henz  University of MainzSELECTIVE STIMULATION OF EEG THETA, ALPHA, AND BETA ACTIVITY BY A FREQUENCY- BASED THERAPEUTICAL APPROACH,<br>Descriptors: frequency- based therapy, EEG, alpha power Effects of brain stimulation on brain activity, cognitive functions and the mental state have been studied extensively. To date, less is known on the effects of frequency- based therapeutical approaches that do not use transcranial electrical or magnetic stimulation but rely on application of natural frequencies. In the present study, we investigated the effects of the frequencybased therapeutical approach Colorbox12 that uses application of distinct sequences of colors and natural auditive frequencies on EEG brain activity and the mental state. Subjects were exposed to distinct frequencies in three experimental conditions (theta, alpha, beta), and one control condition (no frequency) by using the Colorbox12 system. High- density EEG was recorded continuously from 128 electrodes before, during, and after each experimental condition. Each experimental condition was tested for 10 minutes. Results on spontaneous EEG showed increased overall alpha power during and after application of the alpha frequency with subjects reporting increased relaxation. Overall theta and alpha activity increased when the theta frequency was applied. Here, subjects reported increased relaxation. Beta activity increased in frontal areas during application of the beta frequency with subjects reporting increased wakefulness and concentration. We discuss the results and possible fields of application in terms of activation of distinct neural circuits by application of the frequency- based therapeutical approach tested in the present study.

*Poster 1- 058<br>APPLICATION OF A BLUETOOTH HEADSET, CABLE HEADSET, AND A SMARTPHONE CHIP ON THE SMARTPHONE: DO THESE DEVICES REDUCE EFFECTS ON EEG BRAIN ACTIVITY INDUCED BY SMARTPHONEEMITTED ELECTROMAGNETIC FIELDS?<br>Diana Henz  University of Mainz<br>Descriptors: electromagnetic fields, smartphone, EEG<br>Current research demonstrates adverse effects of mobile phone- emitted electromagnetic fields (EMFs) on EEG brain activity and brain health. Technical solutions are developed to reduce these effects such as bluetooth headsets, cable headsets, and smart phone chips that are applied on the surface of the smartphone. In the present study, we investigated whether these technical devices reduce effects of smartphone- emitted radiation on EEG brain activity. Subjects were exposed to smartphone (iPhone X) EMFs in three experimental conditions (bluetooth headset [AirPods], cable headset, smartphone chip [Gabriel- Tech]), and one control condition (no device) in a within- subjects design. Each experimental condition was tested for 20 minutes. High- density EEG was recorded from 128 electrodes before, during, and after each experimental condition. High- frequency EMFs were measured continuously as a control variable. Results show increases in EEG beta and gamma power when subjects are exposed to smartphoneemitted EMFs in frontal, central, temporal, and parietal areas. Further, data of source localization showed increased activity in the hippocampal area when exposed to smartphone- emitted EMFs. Application of the smartphone chip lead to a significant reduction of increases in beta and gamma power. In contrast, application of the bluetooth headset and cable headset lead to increases in overall beta and gamma power in both hemispheres. Results confirm findings from previous studies on the effects of mobile phone- emitted EMFs on brain activity, and effects of mobile phone chip application.