Have been into brainwaves/binaural beats for years and just recently been delving deeper and happened upon this interesting study from the turn of the century...anyone else blown away?
Does DMT influence the frequency of travelling waves?
Previous studies showed that DMT alters specific frequency bands (e.g. alpha-band Schenberg et al., 2015), mostly by decreasing overall oscillatory power (Riba et al., 2002; Timmermann et al., 2019). Here, we investigated whether DMT influences not only the waves’ direction but also their frequency spectrum. We compared the frequencies of the maximum peaks extracted from the 2D-FFT (see Figure 1) before and after DMT or Placebo injection. Before infusion, both FW and BW waves had a strong alpha-range oscillatory rhythm (Figure 3A, labeled ‘PRE’). Remarkably, following DMT injection, the waves’ spectrum changed drastically, with a significant reduction in the alpha-band, coupled with an increase in the delta and theta bands, for both FW (δ-band: BF10 = 391.16, θ-band: BF10 = 19.23, α-band: BF10 = 16.04, β-band: BF10 = 0.64; all errors < 0.001%) and BW waves (δ-band: BF10 = 82.56, θ-band: BF10 = 30.58, α-band: BF10 = 549.54, β-band: BF10 = 1.43; all errors < 0.005%). This result corroborates a previous analysis performed on EEG recordings from the same dataset (Timmermann et al., 2019) as well as independent data pertaining to O-Phosphoryl-4-hydroxy-N,N-DMT (psilocybin), a related compound (Muthukumaraswamy et al., 2013). Moreover, we investigated how DMT influences the amount of waves at each frequency.
elifesciences.org
Does DMT influence the frequency of travelling waves?
Previous studies showed that DMT alters specific frequency bands (e.g. alpha-band Schenberg et al., 2015), mostly by decreasing overall oscillatory power (Riba et al., 2002; Timmermann et al., 2019). Here, we investigated whether DMT influences not only the waves’ direction but also their frequency spectrum. We compared the frequencies of the maximum peaks extracted from the 2D-FFT (see Figure 1) before and after DMT or Placebo injection. Before infusion, both FW and BW waves had a strong alpha-range oscillatory rhythm (Figure 3A, labeled ‘PRE’). Remarkably, following DMT injection, the waves’ spectrum changed drastically, with a significant reduction in the alpha-band, coupled with an increase in the delta and theta bands, for both FW (δ-band: BF10 = 391.16, θ-band: BF10 = 19.23, α-band: BF10 = 16.04, β-band: BF10 = 0.64; all errors < 0.001%) and BW waves (δ-band: BF10 = 82.56, θ-band: BF10 = 30.58, α-band: BF10 = 549.54, β-band: BF10 = 1.43; all errors < 0.005%). This result corroborates a previous analysis performed on EEG recordings from the same dataset (Timmermann et al., 2019) as well as independent data pertaining to O-Phosphoryl-4-hydroxy-N,N-DMT (psilocybin), a related compound (Muthukumaraswamy et al., 2013). Moreover, we investigated how DMT influences the amount of waves at each frequency.
DMT alters cortical travelling waves
Psychedelics induce a pattern of cortical activity very similar to the one observed during visual perception, despite participants had shut eyes.
elifesciences.org