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Activity title

Biomedical Bases of Mental Fatigue and Military Fatigue Countermeasures

Activity Reference

HFM-ET-179

Panel

Human Factors and Medicine

Security Classification

PUBLIC RELEASE

Status

Active

Activity type

ET

Start date

2018

End date

2019

Keywords

bioelectronic devices, mental fatigue, performance, physical fatigue, sleep debt, wearable monitoring

Background

Acute and chronic sleep debt are both responsible for cognitive decrements1,2; mental fatigue (including cognitive decrements) is also induced with a time on task effect in well rested individuals.3,4 Surprisingly, there is no clear consensus regarding a common view and a clear definition of mental fatigue5-7 or about the nature of the link between metnal and physical fatigue8-11 even though this is currently a pressing concern for the military with important human performance and safety implications.12-14 1Killgore, 2010; 2Lowe et al., 2017; 3Ishii et al., 2014; 4Inzlicht & Marcora, 2016; 5 fatigue (Boksem & Tops, 2008; 6Marcora et al., 2009; 7Enoka et Duchateau, 2017; 8Marcora et coll., 2009; 9Martin et coll., 2015; 10Van Cutsem et al., 2017; 11Vrijkotte et al., 2017; 12Yanovich et coll., 2015; 13Taylor et coll., 2016; 14Vrijkotte et al., 2016.

Objectives

The two main objectives of this NATO ET are 1) to clarify and to come to a consensus agreement on a definition of mental fatigue with an attempt to identify common psychophysiological substrates (potential links with sleep debt and/or physical fatigue) and 2) to consider if and how it would be possible to assess and standardize (with age, sex, etc.) decrements of cognitive performance in order to quantify/characterize mental fatigue state(s) in laboratory and field environments.

Topics

Specific examples of potential priorities for the panel include: • Mutual agreement on an operational/scientific definition of mental fatigue. • Validation of a common way (e.g. guidelines) to assess mental fatigue in laboratory/military field environments. • Development and validation of commonly-used laboratory cognitive tests (such as PC-PVT) to assess mental fatigue in military field environments using wearable monitoring, touch-screen and other new devices (i.e. DREEM HeadBand). • Development and validation of cognitive performance metrics using actual performance requirements of warfighting communities that are based upon objective mental fatigue. In addition to specific applications, the panel will also: • Identify common psychophysiological substrates underlying a mental fatigue state using validated wearable systems, questionnaires, tests and eventually biological samples (i.e. saliva). • Develop and validate of a common way (guidelines) to list and to use effective countermeasures (old and new) in order to restrict (if possible to reverse) warfighter mental fatigue state. Neuroscience and psychology disciplines/areas of expertise include but are not limited to: neuropsychology of mental fatigue; neurophysiology of sleep/wake cycle; psychoneuroendocrinology; neurobiology of exercise

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