alexa Surface Electromyography Analysis Of Blepharoptosis Correction By Transconjunctival Incisions | 69259
ISSN: 2161-1459

Journal of Clinical & Experimental Pharmacology
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8th World Congress on Pharmacology and Toxicology

Lung-Chen Tu
Taiwan
Posters & Accepted Abstracts: Clin Exp Pharmacol
DOI: 10.4172/2161-1459-C1-020
Abstract
Upper eyelid movement depends on the antagonisticactions of orbicularis oculi muscle and levatoraponeurosis. Blepharoptosis is an abnormal droopingof upper eyelid margin with the eye in primaryposition of gaze. Transconjunctival incisions forupper eyelid ptosis correction have been a welldevelopedtechnique. Conventional prognosishowever depends on clinical observations and lacksof quantitatively analysis for the eyelid musclecontrolling. This study examines the possibility ofusing the assessments of temporal correlation insurface electromyography (SEMG) as a quantitativedescrip- tion for the change of muscle controllingafter operation. Eyelid SEMG was measured frompatients with blepharoptosis preoperatively andpostoperatively, as well as, for comparative study,from young and aged normal subjects. The data wereanalyzed using the detrended fluctuation analysismethod. The average DFA a index values for all ofthe eyes from the young and aged normal groups andthe patient group from before and after the operationsare plotted in Fig. 7. The results show that thetemporal correlation of the SEMG signals can becharacterized by two indices asso- ciated with thecorrelation properties in short and long time scalesdemarcated at 3 ms, corresponding to the time scaleof neural response. Aging causes degradation of thecorrelation properties at both time scales, and patientgroup likely possess more serious correlationdegradation in long-time regime which wasimproved moderately by the ptosis corrections. Wepropose that the temporal correlation in SEMGsignals may be regarded as an indicator forevaluating the performance of eyelid musclecontrolling in postoperative recovery.
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