![Figure 2. The duration of tolerance of transcutaneous electrical stimulation (TES) at the knee with and without the addition of neostigmine for all 18 volunteers. N = neostigmine. *The addition of 50 [micro sign]g significantly prolonged the duration of the volunteers' tolerance of TES.](https://asa2.silverchair-cdn.com/asa2/content_public/journal/anesthesiology/90/3/10.1097_00000542-199903000-00012/2/12ff2.png?Expires=1716572174&Signature=vHvlSRjvahLmFRG~-sGn4C1dHwRdM0DOJPRDOFBHw6oVXFLMWjmO2DSXoNiR1FayU8QsJNAqEl224J56jC4SrWPAXzCFxpJLq9QT7Kj9k1X2yjy2wunNcoUZq6dJ2s14Lv2fF-DsGU~wjPr6Y4SEokCvxCQHCcaOHoO3ItNpb--QchY1wPz3DKKPeWh1TcyOcy~Ya~c4EkhQrLhrr5ibOai2z~mrPoTkm-vO6HSS5DJ~TAVGzpNU6s0dQuEEOX6YNBbv8ImpwwSCt7HvW6NMA-UFMvaXLd0Dyn2TFgP82ryUyZ-0xypGmRM3Rrm-I8Qplraw5sB3uN8DPkWzS75Dzw__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Figure 2. The duration of tolerance of transcutaneous electrical stimulation (TES) at the knee with and without the addition of neostigmine for all 18 volunteers. N = neostigmine. *The addition of 50 [micro sign]g significantly prolonged the duration of the volunteers' tolerance of TES.
