Sakaino, H · The Kurume medical journal · 2001 · DOI
This study looked at how oral surgery patients respond to intermaxillary fixation (IMF), a procedure that temporarily wires the jaw shut. Researchers measured stress hormones in urine and found that IMF causes significant stress, leading to irritability and sleep problems. When patients were given an anti-anxiety medication, their stress hormone levels were reduced.
This study provides insights into how acute mechanical stress affects the stress hormone system and immune function. While not directly about ME/CFS, understanding stress-induced changes in cortisol and NK activity is relevant to ME/CFS research, as abnormal immune and neuroendocrine responses are implicated in the condition.
This study does not establish that NK cell activity is affected by mechanical stress, nor does it prove that stress hormone elevation directly causes immune suppression in this context. The findings are specific to acute IMF-related stress and cannot be generalized to chronic stress conditions like ME/CFS. Correlation between questionnaire scores and 17-OHCS does not prove causation of the irritability.
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 →
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