Brainwave Self-Regulation During Bispectral IndexTM Neurofeedback in Trauma Center Nurses and Physicians After Receiving Mindfulness Instructions

C Michael Dunham, Amanda L Burger, Barbara M Hileman, Elisha A Chance, Amy E Hutchinson, Chander M Kohli, Lori DeNiro, Jill M Tall, Paul Lisko, C Michael Dunham, Amanda L Burger, Barbara M Hileman, Elisha A Chance, Amy E Hutchinson, Chander M Kohli, Lori DeNiro, Jill M Tall, Paul Lisko

Abstract

Fifty-seven level I trauma center nurses/physicians participated in a 4-day intervention to learn relaxed alertness using mindfulness-based instructions and EEG neurofeedback. Neurofeedback was provided by a Bispectral IndexTM (BIS) system that continuously displays a BIS value (0-100) on the monitor screen. Reductions in the BIS value indicate that power in a high-frequency band (30-47 Hz) is decreased and power in an intermediate band (11-20 Hz) is increased. A wellbeing tool with four positive affect and seven negative affect items based on a 5-category Likert scale was used. The wellbeing score is the sum of the positive affect items (positive affect score) and the reverse-scored negative affect items (non-stress score). Of functional concern were four negative affect items rated as moderately, quite a bit, or extremely in a large percent. Of greater concern were all four positive affect items rated as very slightly or none at all, a little, or moderately in over half of the participants. Mean and nadir BIS values were markedly decreased during neurofeedback when compared to baseline values. Post-session relaxation scores were higher than pre-session relaxation scores. Post-session relaxation scores had an inverse relationship with mean and nadir BIS values. Mean and nadir BIS values were inversely associated with NFB cognitive states (i.e., widening the visual field, decreasing effort, attention to space, and relaxed alertness). For all participants, the wellbeing score was higher on day 4 than on day 1. Participants had a higher wellbeing score on day 4 than a larger group of nurses/physicians who did not participate in the BIS neurofeedback trial. Eighty percent of participants demonstrated an improvement in the positive affect or non-stress score on day 4, when compared to day 1; the wellbeing, non-stress, and positive affect scores were substantially higher on day 4 than on day 1. Additionally, for that 80% of participants, the improvements in wellbeing and non-stress were associated with reductions in day 3 BIS values. These findings indicate that trauma center nurses/physicians participating in an EEG neurofeedback trial with mindfulness instructions had improvements in wellbeing. Clinical Trial Registration: www.ClinicalTrials.gov, identifier NCT03152331. Registered May 15, 2017.

Keywords: BIS monitor; Bispectral Index; mindfulness; neurofeedback; nurses; physicians; stress.

Copyright © 2019 Dunham, Burger, Hileman, Chance, Hutchinson, Kohli, DeNiro, Tall and Lisko.

Figures

FIGURE 1
FIGURE 1
Mindfulness instructions were provided immediately prior to Bispectral IndexTM neurofeedback session 1 and session 2. Immediately following session 2, there was a survey assessment of the relationship between the subject’s employment of mindfulness instructions and their perceptions as to whether they were associated with reductions in BIS values.
FIGURE 2
FIGURE 2
Key events and relevant data.

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