Altered neural dynamics in people who report spontaneous out of body experiences

Abstract

Altered neural dynamics in people who report spontaneous out of body experiences.

Atypical EEG in autism spectrum disorder: Comparing a dimensional and a categorical approach.

“…Specifically, it has been proposed that the visual P1 deflection of the ERP represents the inhibitory-phase of the alpha-band oscillation and acts as an inhibitory filter, increasing signal to noise ratio during stimulus encoding and facilitating top-down integrative processes (Klimesch, Sauseng, & Hanslmayr, 2007). Although we did not find a relationship between ITC and autism traits, reduced ITC may be associated with features of ASD not measured here such as atypicalities of perception, a suggestion which is intriguing in light of recent work carried out in our lab showing that reduced ITC is associated with anomalous perception (Milne, Dunn, Zhao, & Jones, 2019).…”

Binocular rivalry dynamics associated with high levels of self-reported autistic traits suggest an imbalance of cortical excitation and inhibition

“…However, CAPS score did not predict switching or reversion rates or time spent on the mixed or dominant percept. Milne, Dunn, Zhao and Jones (2018) recently reported no difference in the frequency of gamma-band EEG responses in a non-clinical sample of those who report hallucinatory experiences. Differences in the frequency of the visual induced gamma-band response are thought to be indicative of variation in the balance of neural excitation and inhibition (Snijders, Milivojevic & Kemner, 2013).…”

No effects of transcranial direct current stimulation on visual evoked potential and peak gamma frequency

“…After setting up the EEG equipment, participants were asked to complete two runs of an EEG task before and after 10 min of occipital tDCS. The EEG task has been used previously (Milne et al, 2018;Milne et al, 2019). The task was generated using Psychtoolbox-MATLAB (Brainard & Vision, 1997) and presented on a 20-inch LCD monitor.…”

“…Participants were asked to respond in the first block using their right hand and their left hand in the second block. Each run lasted 12-15 min, depending on the duration of participants' break of optional duration between the run's two blocks (Fig (Milne et al, 2018).…”

“…Thus, using identical tDCS protocols and montages to those used previously (Bin Dawood et al, 2020), the current study investigated the effects of occipital tDCS on E-I processes by examining electrophysiological signatures of E-I balance, namely, VEP components (N1 and P2) and peak gamma frequency measured by electroencephalogram (EEG). As VEP activity and gamma frequency are sensitive to the features of visual task (e.g., stimulus size, contrast, and frequency) (Bach & Ullrich, 1997;Busch et al, 2004;Korth & Nguyen, 1997;Schadow et al, 2007) and are unlikely to be clearly elicited by behavioural tasks such as ODT, we used an EEG task that has been shown to elicit a robust VEP response and clear peak gamma frequency (Milne et al, 2018;Milne et al, 2019). It was hypothesised that anodal-tDCS would increase the amplitude of VEP-N1 and decrease the amplitude of VEP-P2, whereas cathodal-tDCS would lead to the opposite effects (decrease VEP-N1 and increase VEP-P2), in accordance with the findings and suggestions of animal and human studies (Antal et al, 2004;Zemon et al, 1980;Zeneroli et al, 1981).…”