Document Detail

An audiometric study of the effects of paraspinal stimulation on hearing acuity in human subjects - understanding the Harvey Lillard phenomenon.
MedLine Citation:
PMID:  25419454     Owner:  NLM     Status:  Publisher    
BACKGROUND: The founder of chiropractic, Daniel David Palmer, constructed a model of causation of disease based on his seminal experience with a patient, Harvey Lillard, who lost his hearing at the instant of injuring his upper back, but had his hearing restored suddenly 17 years later after receiving spinal manipulation. Palmer's model of disease causation, that of displaced vertebrae impinging on spinal nerves and thereby disrupting the innervation of dependent organs, was in fact incongruent with what was known at the time about human neuroanatomy and neurophysiology. The current study proposes and tests an alternative hypothesis: that increased afferent input from paraspinal muscles attenuates the central transmission of auditory information.
METHODS: Between September 13 and November 13, 2013, forty healthy young adults were recruited and randomly divided into two cohorts: one receiving successive trials of sham TENS, and the second receiving sham and then authentic TENS. During the administration of sham and authentic TENS to the upper thoracic spine, hearing acuity was measured to determine perception thresholds at the frequencies normally tested clinically.
RESULTS: In the first cohort, there were no differences in perception thresholds in the first and second trials of sham TENS, speaking to the reliability of the testing process. In the second cohort, there were no significant differences in perception thresholds during sham and authentic TENS.
CONCLUSIONS: Within the constraints of the current study design, including demographic characteristics and TENS parameters, there was no evidence that innocuous afferent input to upper thoracic paraspinal muscles modulated thresholds of audibility.
Mark Demers; Zehra Gajic; Everett Gerretsen; Brian Budgell
Related Documents :
25235604 - Using developmental data to explore frequency effects in production.
24835124 - Improvements in remote cardio-pulmonary measurement using a five band digital camera.
25282574 - An isokinetic method for inducing a localised fatigue effect in the plantarflexors and ...
25150554 - Quantification of postural stability in older adults using mobile technology.
530514 - Encoding of graded noxious skin heating by neurons in posterior thalamus and adjacent a...
24979784 - Single-residue insertion switches the quaternary structure and exciton states of crypto...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-11-19
Journal Detail:
Title:  Chiropractic & manual therapies     Volume:  22     ISSN:  2045-709X     ISO Abbreviation:  Chiropr Man Therap     Publication Date:  2014  
Date Detail:
Created Date:  2014-11-24     Completed Date:  -     Revised Date:  2014-11-25    
Medline Journal Info:
Nlm Unique ID:  101551481     Medline TA:  Chiropr Man Therap     Country:  -    
Other Details:
Languages:  ENG     Pagination:  39     Citation Subset:  -    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Life story resources in dementia care: a review.
Next Document:  Bioinspired amphiphilic phosphate block copolymers as non-fluoride materials to prevent dental erosi...