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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: J Urol. 2010 Dec 18;185(2):737–743. doi: 10.1016/j.juro.2010.09.079

Figure 1.

Figure 1

A distension evoked bladder contraction during the initial urodynamic fill confirmed intact detrusor muscle and pelvic nerve function. The peak detrusor pressure, bladder pressure (not shown) minus the rectal pressure, was defined as maximum Pdet. The recorded perineal electromyogram (raw EMG) was rectified and averaged to determine the maximum EMG activity evoked during a sustained bladder contraction. The bladder volume at which a sustained bladder contraction occurred was defined as the threshold (Vth).