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Volume 7, Issue 4 (Suppl)
Clin Exp Pharmacol
ISSN: 2161-1459 CPECR, an open access journal
Pharmacology Congress 2017
July 24-25, 2017
July 24-25, 2017 Melbourne, Australia
8
th
World Congress on
Pharmacology and Toxicology
Surface electromyography analysis of blepharoptosis correction by transconjunctival incisions
Lung-Chen Tu
Taiwan
U
pper 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.
lawrencetu99@gmail.comClin Exp Pharmacol 2017, 7:4 (Suppl)
DOI: 10.4172/2161-1459-C1-020