Hypothalamus Connectivity in Adolescent Myalgic Encephalomyelitis/Chronic Fatigue Syndrome

Area of Science:

• Neuroimaging
• Adolescent Medicine
• Neurology

Background:

• Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a debilitating condition in adolescents with unknown causes.
• The hypothalamus is increasingly implicated in ME/CFS pathophysiology.
• Magnetic resonance imaging (MRI) studies of hypothalamic connectivity in adolescent ME/CFS are scarce.

Purpose of the Study:

• To investigate hypothalamic connectivity using MRI in adolescents diagnosed with ME/CFS.
• To explore the relationship between observed connectivity patterns, fatigue severity, and duration of illness.

Main Methods:

• 25 adolescents with ME/CFS and 23 healthy controls underwent structural and diffusion-weighted MRI.
• Structural networks were created using QSIPrep and custom parcellation.
• Connectivity (degree and strength) was analyzed using Bayesian regression models, correlating with fatigue scores and illness duration.

Main Results:

• Adolescents with ME/CFS exhibited increased connectivity degree in anterior and left hypothalamus regions compared to controls.
• Posterior hypothalamus connectivity degree decreased with longer illness duration in ME/CFS patients.
• A weak association was found between right intermediate hypothalamus connectivity strength and fatigue severity in the ME/CFS group.

Conclusions:

• Findings suggest alterations in hypothalamic connectivity in adolescents with ME/CFS.
• These neuroimaging findings warrant further investigation into the role of the hypothalamus in ME/CFS.
• Hypothalamic connectivity may serve as a potential biomarker for ME/CFS severity and progression.