- CConnexion
RééDOC
75 Boulevard Lobau 54042 NANCY cedex Christelle Grandidier Documentaliste 03 83 52 67 64 0
|
Effect of increased sympathetic activity on electrical activity from myofascial painful areas
CHUNG JW; OHRBACH R; MCCALL WD
AM J PHYS MED REHABIL , 2004, vol. 83, n° 11, p. 842-850 Doc n°: 115770 Localisation : Documentation IRR Descripteurs : AK2 - EMG Objective: To investigate the effect of increased sympathetic outflow to muscle (by means of elevated intrathoracic pressure) on painful-area electrical activity. Design: In six subjects with myofascial painful areas in trapezius muscles during normal respiration and during elevated intrathoracic pressure, electromyographic epochs were recorded from a monopolar needle electrode inserted over the painful area and advanced until action potentials were detected, a second needle electrode inserted to the same depth over a nontender control area, and surface electrodes placed nearby. Results: The painful-area electromyographic activity increased (P < 0.05) from 49 +/- 53 muV during normal respiration to 121 +/- 80 muV during elevated intrathoracic pressure. The control-area electromyographic activity and the surface-electrode electromyographic activity did not increase significantly. Conclusion: The significant electromyographic increase from painful areas and no significant increase from control channels are consistent with the view that sympathetic neural outflow increases painful-area electrical activity. Langue : ANGLAIS |
0
|