The evaluation of pelvic floor muscle tone depending on how the probe was placed.

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1. A higher resting and funtional PFM activity is observed in more distal areas from the introitus of the vagina.

2. A higher resting and funtional PFM activity is observed on the anterior wall of the vagina

Immediately after all examinations are completed for each patient

The main objective is to determine how depth of placement of electrodes its influence on functional and resting bioelectrical activity of PFM. Moreover the probe will be placed in two different ways: toward the anterior or posterior wall of the vagina. A secondary objective is to evaluate the correlation between the activity of PFM, which was measured at various areas of vagina

The target population in this study will be healthy, nulliparous women. Lack of control group.

Participants will need to attend the examination once only. The duration
of the examination will be approximately 30 minutes.

The measurements:

Electromyographic examination of pelvic floor muscles by means of the intravaginal probe OPTIMA 3 (Sugar International, France) with 3 independent, hemispherical electrodes (recording plates).
Measurement of electrical activity of PFM will be assessed in standing position. Prior to measurements, each participant will be instructed how to perform an isolated PFM contraction and take positions used in this study. Resting and functional sEMG activity (in microvolts - µV) will be recorded.