Gray matter abnormalities in pediatric mild traumatic brain injury

Area of Science:

• Neuroscience
• Pediatric Neurology
• Radiology

Background:

• Pediatric mild traumatic brain injury (pmTBI) is common in children, leading to acute and chronic neuropsychiatric issues.
• The prospective pathophysiology of gray matter diffusion and atrophy in pmTBI remains poorly understood.

Purpose of the Study:

• To prospectively investigate changes in gray matter diffusion and atrophy in children following pmTBI.
• To correlate neuroimaging findings with clinical and cognitive assessments over time.

Main Methods:

• A prospective study involving 15 children with semi-acute pmTBI and 15 matched healthy controls.
• Clinical assessments included attention, processing speed, executive function, memory, and self-reported symptoms.
• Neuroimaging utilized fractional anisotropy (FA) for diffusion and atrophy measures in gray matter structures at baseline and 4 months.

Main Results:

• Patients showed reduced attention and processing speed with increased diffusion in the left superior temporal gyrus and right thalamus acutely.
• Increased diffusion persisted at 4 months, with partial cognitive recovery.
• Cortical atrophy in frontal and left-hemisphere regions emerged at 4 months post-injury.

Conclusions:

• Neurobehavioral, diffusion, and atrophy markers exhibit distinct recovery timelines after pmTBI.
• Patient self-report and standard clinical evaluations may not fully capture the extent or duration of recovery.