Mental workload and neural efficiency quantified in the prefrontal cortex using fNIRS

Abstract : An improved understanding of how the brain allocates mental resources as a function of task difficulty is critical for enhancing human performance. Functional near infrared spectroscopy (fNIRS) is a fielddeployable optical brain monitoring technology that provides a direct measure of cerebral blood flow in response to cognitive activity. We found that fNIRS was sensitive to variations in task difficulty in both real-life (flight simulator) and laboratory settings (tests measuring executive functions), showing increased concentration of oxygenated hemoglobin (HbO2) and decreased concentration of deoxygenated hemoglobin (HHb) in the prefrontal cortex as the tasks became more complex. Intensity of prefrontal activation (HbO2 concentration) was not clearly correlated to task performance. Rather, activation intensity shed insight on the level of mental effort, i.e., how hard an individual was working to accomplish a task. When combined with performance, fNIRS provided an estimate of the participants’ neural efficiency, and this efficiency was consistent across levels of difficulty of the same task. Overall, our data support the suitability of fNIRS to assess the mental effort related to human operations and represents a promising tool for the measurement of neural efficiency in other contexts such as training programs or the clinical setting.
Type de document :
Article dans une revue
Scientific Reports, Nature Publishing Group, 2017, vol. 7 (n° 1), pp. 1-15. 〈10.1038/s41598-017-05378-x〉
Liste complète des métadonnées

Littérature citée [86 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-01565168
Contributeur : Open Archive Toulouse Archive Ouverte (oatao) <>
Soumis le : mercredi 19 juillet 2017 - 15:20:43
Dernière modification le : mardi 25 juillet 2017 - 10:56:26

Fichier

Causse_18095.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

Citation

Mickael Causse, Zarrin Chua, Vsevolod Peysakhovich, Natalia Del Campo, Nadine Matton. Mental workload and neural efficiency quantified in the prefrontal cortex using fNIRS. Scientific Reports, Nature Publishing Group, 2017, vol. 7 (n° 1), pp. 1-15. 〈10.1038/s41598-017-05378-x〉. 〈hal-01565168〉

Partager

Métriques

Consultations de
la notice

37

Téléchargements du document

25