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Muscle Activation Plot (MAP) for vocal fold strain as a function of graded levels of left and right SLN activation. The greatest positive strain (+25%) was seen with the highest symmetric bilateral SLN activation and the greatest negative strain (−18%) was seen at bilateral zero SLN activation. Unilateral SLN activation levels resulted in maximal strain that was in between these values (+5.8% for R SLN paralysis; +5.3 for L SLN paralysis).
