Prasher, D, Smith, A, Findley, L · Journal of neurology, neurosurgery, and psychiatry · 1990 · DOI
This study tested whether ME/CFS patients have objective brain activity differences related to thinking and attention. Researchers used special sensors to measure how the brain responds to sounds and tasks requiring concentration. While basic sensory responses were normal, they found that brain signals related to attention and processing speed were slower in about one-third to one-half of patients tested, suggesting ME/CFS affects how the brain handles information rather than basic sensation.
This study provides objective neurophysiological evidence that ME/CFS involves measurable changes in how the brain processes information, supporting patient reports of cognitive difficulties. These findings help distinguish ME/CFS from depression and other conditions, potentially validating the neurological basis of cognitive symptoms that are often dismissed.
This study does not identify the underlying cause of these brain abnormalities or prove that VP1 antigen status determines cognitive dysfunction. It demonstrates correlation between ME/CFS and altered brain potentials, but cannot establish whether these changes are permanent, reversible, or progressive. The findings are limited to the specific cognitive tasks tested and may not reflect all types of cognitive impairment experienced by patients.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
Contribute
Private, reviewed by a human. Not a public comment thread.