Assessment of Brain Function After 240 Days Confinement Using Functional Near Infrared Spectroscopy.

ABSTRACT: Future space exploration missions will expose astronauts to various stressors, making the early detection of mental stress crucial for prolonged missions. Our study proposes using functional near infrared spectroscopy (fNIRS) combined with multiple machine learning models to assess the level of mental stress. Objective: The objective is to identify and quantify stress levels during 240 days confinement scenario. In this study, we utilize a diverse set of stress indicators including salivary alpha amylase (sAA) levels, reaction time (RT) to stimuli, accuracy of target detection, and power spectral density (PSD), in conjunction with functional connectivity networks (FCN). We estimate the PSD using Fast Fourier Transform (FFT) and the FCN using partial directed coherence. Results:</

SUBMITTER: Al-Shargie F 

PROVIDER: S-EPMC11573361 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature