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Fig. 3 | BMC Psychiatry

Fig. 3

From: Clinical, hemispheric, and autonomic changes associated with use of closed-loop, allostatic neurotechnology by a case series of individuals with self-reported symptoms of post-traumatic stress

Fig. 3

Spectrographs of bilateral temporal lobe electrical activity for a 71 year old male Vietnam War veteran with PTSD and multiple co-morbidities, from baseline assessment (a) and penultimate minute of the fourth HIRREM session (b). Data were collected from bilateral temporal lobes (T3 and T4 in the 10–20 International EEG system), with frequency (Hz, vertical axis) plotted against amplitude (microvolts, μv, horizontal axis). Individual color bars reflect amplitude averages for one minute of recording, eyes closed, at rest, without stimulation. Columns to the left and right of the color bars denote ten frequency ranges of aggregated data (Hz, 00: <1.0; 10: 1.0–3.0; 20: 3.0–5.5; 30: 5.5–7.5; 40: 7.5–10.0; 50: 10.0–12.0; 60: 12.0–15.0; 70: 15.0–23.0; 80: 23.0–36.0; 90: 36.0–48.0) and numerical values for averages in those ranges

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