DTI Study on Brain Structure and Cognitive Function in Patients with Chronic Mountain Sickness.

Area of Science:

• Neuroimaging
• Neurology
• High-altitude medicine

Background:

• Chronic mountain sickness (CMS) involves irreversible brain damage from chronic hypoxia.
• Elevated hemoglobin and blood stasis contribute to neurological impairment in CMS patients.
• Cognitive deficits and memory issues are common in individuals with CMS.

Purpose of the Study:

• To evaluate brain structural damage in CMS patients using Diffusion Tensor Imaging (DTI).
• To correlate imaging metrics (Fractional Anisotropy - FA, Apparent Diffusion Coefficient - ADC) with CMS severity and cognitive scores (Mini-Mental State Examination - MMSE).

Main Methods:

• 17 CMS patients and 15 healthy controls underwent MRI and DTI.
• FA and ADC values were measured in regions of interest (ROIs).
• Comparisons were made between CMS patients and controls, and correlations with hemoglobin (Hb) and MMSE scores were analyzed.

Main Results:

• CMS patients showed increased susceptibility to intracranial ischemia, infarction, and hemorrhage.
• Multiple brain structural changes were observed in CMS patients, linked to disease severity.
• White matter fiber bundles were largely unaffected, except at sites of ischemia.

Conclusions:

• Brain structural alterations in CMS are associated with disease severity and cognitive decline.
• DTI parameters (FA, ADC) can help quantify neurological damage in CMS.
• Further research is needed to understand the long-term neurological consequences of CMS.