Related Experiment Video
Updated: Nov 17, 2025
Development of an Uncomplicated Mild Traumatic Brain Injury Model Modified by Weight-Drop Method and Evidenced by Magnetic Resonance Imaging
Published on: April 11, 2025
Link between Mild Traumatic Brain Injury, Poor Sleep, and Magnetic Resonance Imaging: Visible Perivascular Spaces in
Juan Piantino1, Daniel L Schwartz2,3, Madison Luther1
1Department of Pediatrics, Division of Child Neurology, Doernbecher Children's Hospital, Department of Emergency Medicine, Oregon Health & Science University, Portland, Oregon, USA.
Abstract:
Impaired clearance of perivascular waste in the brain may play a critical role in morbidity after mild traumatic brain injury (mTBI). We aimed to determine the effect of mTBI on the burden of magnetic resonance imaging (MRI)-visible perivascular spaces (PVSs) in a cohort of U.S. military veterans and whether sleep modulates this effect. We also investigated the correlation between PVS burden and severity of persistent post-concussive symptoms. Fifty-six Iraq/Afghanistan veterans received 3 Tesla MRI as part of a prospective cohort study on military blast mTBI. White matter PVS burden (i.e., number and volume) was calculated using an established automated segmentation algorithm. Multi-variate regression was used to establish the association between mTBIs sustained in the military and PVS burden. Covariates included age, blood pressure, number of impact mTBIs outside the military, and blast exposures. Correlation coefficients were calculated between PVS burden and severity of persistent post-concussive symptoms. There was a significant positive relationship between the number of mTBIs sustained in the military and both PVS number and volume (p = 0.04). A significant interaction was found between mTBI and poor sleep on PVS volume (p = 0.04). A correlation was found between PVS number and volume, as well as severity of postconcussive symptoms (p = 0.03). Further analysis revealed a moderate correlation between PVS number and volume, as well as balance problems (p < 0.001). In Iraq/Afghanistan veterans, mTBI is associated with an increase in PVS burden. Further, an interaction exists between mTBI and poor sleep on PVS burden. Increased PVS burden, which may indicate waste clearance dysfunction, is associated with persistent post-concussive symptom severity.
Insights
Mild traumatic brain injury (mTBI) increases perivascular space (PVS) burden in veterans, potentially impairing brain waste clearance. Poor sleep exacerbates this effect, correlating with persistent post-concussive symptoms.
Area of Science:
- Neuroscience
- Radiology
- Sleep Medicine
Background:
- Impaired brain waste clearance, indicated by perivascular spaces (PVS), is implicated in mild traumatic brain injury (mTBI) morbidity.
- Understanding mTBI's impact on PVS burden and the role of sleep is crucial for veteran health.
Purpose of the Study:
- To investigate the association between military-sustained mTBI and PVS burden in U.S. military veterans.
- To determine if sleep quality modulates the effect of mTBI on PVS burden.
- To explore the correlation between PVS burden and persistent post-concussive symptom severity.
Main Methods:
- Prospective cohort study of 56 Iraq/Afghanistan veterans undergoing 3 Tesla MRI.
- Automated segmentation algorithm to quantify white matter PVS number and volume.
- Multivariate regression and correlation analyses to assess mTBI, sleep, and symptom severity relationships.
Main Results:
- A significant positive relationship was observed between the number of military mTBIs and both PVS number and volume (p=0.04).
- A significant interaction between mTBI and poor sleep was found to affect PVS volume (p=0.04).
- Increased PVS burden correlated with the severity of persistent post-concussive symptoms, including balance problems (p<0.001).
Conclusions:
- Military mTBI is associated with increased PVS burden in veterans, suggesting impaired brain waste clearance.
- Sleep quality significantly interacts with mTBI to influence PVS burden.
- Elevated PVS burden is linked to greater severity of persistent post-concussive symptoms, highlighting a potential mechanism for long-term deficits.
