Results
The mean age of studied cases was 56 ± 17.05. There was 4 (33.33%) male, 8 (66.67%) female. The mean BMI of studied cases was 30.27 ± 4.78 (Table 
Descriptive analysis of the studied cases according to demographic data (n = 12)SD: Standard deviationSQI and EMG were significantly higher in frontal than at post-A all measurements (
Comparison between Frontal and Post-A according to SQI (n = 12)SQI; signal quality index, LOC; the eyelash reflex is lost
Comparison between Frontal and Post-A according to EMG (n = 12)EMG; electromyography, LOC; the eyelash reflex is lostThe overall BIS value at the frontal position was significantly higher than the post-auricular position at awake, incision, 30 and 90 min (
Comparison between Frontal and Post-A according to BIS (n = 12)BIS; The bispectral index, LOC; the eyelash reflex is lostA strong link between the two sensor positions, as indicated by the correlation coefficient (r = 0.607, 