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Mastoid Fossa Temperature Differentials & Health Perception

John Hart DC, MHSc 

Journal of Vertebral Subluxation Research ~ September 28, 2010 ~ Pages 1-6



Introduction: Mastoid fossa temperature differential (MFD) procedure is one method of analyzing the neurological interference component of the vertebral subluxation. Outcomes research for MFD is lacking. This study compares MFD readings to the outcome of health perception.


Methods: From a previously published study, MFD readings and corresponding SF-12 data for 68 participants were analyzed. The SF-12 data were sorted by physical and mental composite scores (PCS and MCS) and corresponding MFD readings were assessed for differences with a score of 50 being the cut-off point separating above average versus below average health perception scores.


Results: No statistical difference was found in MFD readings in above average versus below average MCS groups. Participants having above average PCS scores tended to show larger MFD readings though actual differentials (versus absolute differentials) revealed the only statistically significant difference (p = 0.0103).


Discussion: The unexpected finding that wider differentials are related to a better outcome, in this case, physical health perception, runs contrary to the symmetry method of skin temperature interpretation.


Conclusion: In this study, wider mastoid actual fossa differential readings were associated with better physical health perception.


Key Words: Vertebral subluxation, Skin temperature, chiropractic, health status

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