Beckett S D, Walker D F, Hudson R S, Reynolds T M, Purohit R C
Am J Vet Res. 1975 Apr;36(4 Pt.1):431-3.
A needle-tipped catheter or subminiature pressure transducer was implanted in the corpus spongiosum penis (CSP) of Shetland Pony stallions to determine pressure during coitus. Electrodes for monitoring the electromyographic (EMG) activity were implanted in the ischiocavernosus (IC) and bulbospongiosus (BS) muscles. The mean peak CSP pressure recorded with the catheter was 762 mm of Hg, and with the subminiature pressure transducer, it was 994 mm of Hg. The simultaneous occurrence of the CSP pressure peaks and bursts of BS muscle activity indicated that these muscles were the likely source of energy for the increased pressures, which were far greater than the systemic blood pressure. This conclusion was further supported by the finding that anesthesia of the BS muscles greatly reduced the CSP pressures of the stallion during attempted coitus.
将针状导管或超小型压力传感器植入设得兰矮种公马的阴茎海绵体（CSP）中，以测定交配时的压力。用于监测肌电图（EMG）活动的电极植入坐骨海绵体肌（IC）和球海绵体肌（BS）中。用导管记录的CSP平均峰值压力为762毫米汞柱，用超小型压力传感器记录的为994毫米汞柱。CSP压力峰值与BS肌肉活动爆发同时出现，表明这些肌肉可能是压力升高的能量来源，而压力远高于全身血压。BS肌肉麻醉会在公马试图交配时大幅降低其CSP压力，这一发现进一步支持了该结论。
