Night duty and decreased brain activity of medical residents: a wearable optical topography study

Nishida, Masaki; Kikuchi, Senichiro; Miwakeichi, Fumikazu; Suda, Shiro

doi:10.1080/10872981.2017.1379345

Cited by 18 publications

(21 citation statements)

References 35 publications

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“…Cognitive impairments in nurses during the night shift as opposed to the day shift may be mediated predominantly through the decreased alertness and attention that occurs with wake-state instability. This is consistent with previous research, although not focused on nurses [11,12,33].…”

Section: Discussionsupporting

confidence: 94%

“…As far as we know, the present study is the first to attempt to evaluate the disturbances in the brain functions of on-duty nurses by direct assessments of cerebral haemodynamic reactivity measured by PFC oxygenation (decreased rSO 2 ) using a non-invasive NIRS method. Although similar studies have been conducted, they have focused on on-duty medical residents [32,33]. It was found that cerebral perfusion may be an important mechanism, as blood flow, especially to the PFC, directly governs oxygen delivery [34].…”

Section: Discussionmentioning

confidence: 99%

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Night Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study

Durán-Gómez

Guerrero-Martín

Pérez-Civantos

et al. 2021

IJERPH

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Background: Shift working is associated with a profound desynchronization of circadian rhythm and in particular, night-shift work disrupts normal circadian physiology. Sleep deprivation affects the functioning of certain brain areas and thus impairs cognitive performance. The purpose of this study was to investigate the effects of the night shift on cognitive performance and cerebral oxygenation/haemodynamics. Methods: A prospective, observational, comparative, randomized and cross-over study was carried out. A total of 74 intensive care unit nurses in Spain were included in the study. The following variables were measured: sociodemographic, burnout, anxiety, baseline cerebral oxygenation levels on night and day shift using a near-infrared spectroscopy system and cognitive task performance during a verbal fluency task to evaluate the alterations in the prefrontal cortex, assessed as changes in regional saturation index. Results: The average regional saturation index decreased significantly in the night shift (r = 0.560, p < 0.001). The ICU nurses showed a significant decrease in the verbal fluency test on average (8.53 ± 8.49, p < 0.001) and, in general, there was also a significant increase in anxiety score (3.17 ± 7.56, p = 0.001). Conclusions: Sleep deprivation during the night shift was considered to be related to decreased dorsolateral PFC reactivity. After the night shift, the nurses showed a decrease in prefrontal cortex activity and in cognitive performance.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Night Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study

Durán-Gómez

Guerrero-Martín

Pérez-Civantos

et al. 2021

IJERPH

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“…In the present study as much as 78% residents reported poor sleep quality on PSQI. Nishida M et al [23] found that the residents' ability to perform relatively simple procedures like withdrawing blood was significantly impaired following night duty, where significant acute sleep deprivation was present, as tested by the ESS and PSQI. Min, A.…”

Section: Discussionmentioning

confidence: 99%

Sleep Assessment and Perceived Stress Amongst Medical Postgraduate Residents

Ajgaonkar

Bidikar

2019

IJMBS

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Background: Medical graduates who enter into residency programmes form the backbone of the healthcare delivery system of the country. They are often expected to work for long hours which leads to sleep deprivation and increase in the perceived stress levels. Chronic sleep deprivation leads to destruction of sleep architecture. It may also compromise patient care. We examine the relationship between these two variables through this study. Material and methods: 50 resident doctors from different specialties of medicine were administered three validated questionnaires: the Epworth sleepiness scale (ESS), Pittsburgh sleep quality index (PSQI) and Cohen’s perceived stress scale (PSS-10) to assess the daytime sleepiness, sleep quality and perceived stress levels respectively. Result: A total of 56% residents reported greater than average scores on the ESS (Mean score=11.02 + 5.5161, Range= 1-24). On the PSQI, 78% residents reported poor sleep quality (Mean score=6.98 + 3.146, range= 0-15) whereas on the PSS-10, 84% of the residents reported moderate to high levels of perceived stress (Mean score=19.16+7.138, range=3-37). Significant correlation was found between ESS and CPSS (Pearson coefficient=0.4738, p<0.01) as well as PSQI and CPSS (Pearson coefficient=0.3024, p<0.05). It is hypothesised that there is a causal relationship between daytime sleepiness perceived stress levels as well as sleep quality and perceived stress levels. KEYWORDS: Sleep deprivation, Perceived stress, Stress levels, Epworth Sleepiness scale, sleep quality.

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“…In addition, there is some evidence that several biopsychosocial factors (e.g., circadian rhythms [240][241][242], level of sleepiness [243], and level of arousal [244]) can influence cognitive performance. In particular, it was observed (i) that measures of the cortical hemodynamic response (e.g., obtained during a cognitive test) are associated with total sleep duration [245,246] and sleepiness [247,248] and (ii) that total sleep duration is associated with acute exercise-related changes in behavioral performance (e.g., executive function performance) [82]. Interestingly, the relationship between total sleep duration and acute exercise-related changes in executive function performance are mediated by the volume of the caudate nuclei [82].…”

Section: Resultsmentioning

confidence: 99%

The Contribution of Functional Magnetic Resonance Imaging to the Understanding of the Effects of Acute Physical Exercise on Cognition

et al. 2020

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The fact that a single bout of acute physical exercise has a positive impact on cognition is well-established in the literature, but the neural correlates that underlie these cognitive improvements are not well understood. Here, the use of neuroimaging techniques, such as functional magnetic resonance imaging (fMRI), offers great potential, which is just starting to be recognized. This review aims at providing an overview of those studies that used fMRI to investigate the effects of acute physical exercises on cerebral hemodynamics and cognition. To this end, a systematic literature survey was conducted by two independent reviewers across five electronic databases. The search returned 668 studies, of which 14 studies met the inclusion criteria and were analyzed in this systematic review. Although the findings of the reviewed studies suggest that acute physical exercise (e.g., cycling) leads to profound changes in functional brain activation, the small number of available studies and the great variability in the study protocols limits the conclusions that can be drawn with certainty. In order to overcome these limitations, new, more well-designed trials are needed that (i) use a more rigorous study design, (ii) apply more sophisticated filter methods in fMRI data analysis, (iii) describe the applied processing steps of fMRI data analysis in more detail, and (iv) provide a more precise exercise prescription.Brain Sci. 2020, 10, 175 2 of 31 improve cognitive domains, such as attention and/or cognitive control substantially, albeit only transiently [30][31][32][33]. However, the underlying neurobiological mechanisms of these effects are not yet fully understood. In this regard, the use of neuroimaging methods offers great potential for acquiring a deeper understanding of physical exercise-induced changes in the neural correlates of cognition, such as changes in functional brain activation [33][34][35]. The most common methods used to investigate effects on functional brain activation are functional near-infrared spectroscopy (fNIRS) [34] and electroencephalography (EEG) [36,37]; however, also functional magnetic resonance imaging (fMRI) has recently been applied in the context of acute physical exercise and cognition [38,39]. The strengths of fNIRS and EEG compared to fMRI are a higher temporal resolution, greater portability, and applicability in almost all cohorts (e.g., for individuals with metallic implants or claustrophobia) [34,40,41]. However, fNIRS and EEG have a limited spatial resolution and only allow for the evaluation of brain activation patterns in cortical areas [41][42][43]. In comparison to fNIRS and EEG, fMRI enables the assessment of brain activation changes in cortical and subcortical areas and offers a higher spatial resolution, which results in superior source localization [42][43][44]. Hence, fMRI is well suited to study the influence of acute physical exercise on subcortical structures, such as the hippocampus, which have a crucial role in cognitive processes (e.g., memory) [45][46][47][48][49...

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Night duty and decreased brain activity of medical residents: a wearable optical topography study

Cited by 18 publications

References 35 publications

Night Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study

Night Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study

Sleep Assessment and Perceived Stress Amongst Medical Postgraduate Residents

The Contribution of Functional Magnetic Resonance Imaging to the Understanding of the Effects of Acute Physical Exercise on Cognition

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