Neuroplasticity in F16 fighter jet pilots

Front Physiol. 2023 Feb 15:14:1082166. doi: 10.3389/fphys.2023.1082166. eCollection 2023.

Abstract

Exposure to altered g-levels causes unusual sensorimotor demands that must be dealt with by the brain. This study aimed to investigate whether fighter pilots, who are exposed to frequent g-level transitions and high g-levels, show differential functional characteristics compared to matched controls, indicative of neuroplasticity. We acquired resting-state functional magnetic resonance imaging data to assess brain functional connectivity (FC) changes with increasing flight experience in pilots and to assess differences in FC between pilots and controls. We performed whole-brain exploratory and region-of-interest (ROI) analyses, with the right parietal operculum 2 (OP2) and the right angular gyrus (AG) as ROIs. Our results show positive correlations with flight experience in the left inferior and right middle frontal gyri, and in the right temporal pole. Negative correlations were observed in primary sensorimotor regions. We found decreased whole-brain functional connectivity of the left inferior frontal gyrus in fighter pilots compared to controls and this cluster showed decreased functional connectivity with the medial superior frontal gyrus. Functional connectivity increased between the right parietal operculum 2 and the left visual cortex, and between the right and left angular gyrus in pilots compared to controls. These findings suggest altered motor, vestibular, and multisensory processing in the brains of fighter pilots, possibly reflecting coping strategies to altered sensorimotor demands during flight. Altered functional connectivity in frontal areas may reflect adaptive cognitive strategies to cope with challenging conditions during flight. These findings provide novel insights into brain functional characteristics of fighter pilots, which may be of interest to humans traveling to space.

Keywords: MRI; brain; fighter pilots; gravity transitions; neuroplasticity; resting state fMRI.

Grants and funding

SL is Research Director at the Belgian National Fund for Scientific Research (FRS-FNRS) and supported by the Human Brain Project, National Natural Science Foundation of China, Mind Science Foundation, European Foundation of Biomedical Research FERB Onlus, BIAL Foundation, European Space Agency, fund Generet of King Baudouin Foundation, Mind Care International Foundation, TRAINM NeuroRehab Centre Antwerp. This study was supported by the Belgian Science Policy (BELSPO) ‐ Prodex.