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Subscription and Renewal Information Index of Current & Previous Issues Research Update Newsletter Index The Chiropractic Advocacy Council
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About the Cover: Sequential surface electromyographic (EMG) scans of a 6 year old female. The electrical signals produced when
muscle contracts are measured and recorded using surface EMG techniques (SEMG). Readings are interpreted for pattern, symmetry, and amplitude. In this case, elevated and asymmetrical signals were observed upon admission to care. One month later, a follow-up examination demonstrated improvement, although similar patterns and asymmetries were observed. The third scan disclosed a marked changed, characterized by near symmetry and fewer levels outside of the normal range. SEMG is used to
evaluate dysponesis, associated with vertebral subluxation. Dysponesis refers to a reversible pathophysiologic state
consisting of errors in energy dissipation which may result in functional disorders. Dysponesis is believed to manifest primarily as covert errors in action potential arising from the motor and pre-motor areas of the cortex. and the neuro-muscular consequences of that output. SEMG scanning provides qualitative and quantitative
data to assist the chiropractor in determining the character of muscle changes which may be associated with vertebral subluxation.
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