Merritt A M, Panzer R B, Lester G D, Burrow J A
Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville 32610-0136, USA.
Am J Physiol. 1995 Aug;269(2 Pt 1):G262-8. doi: 10.1152/ajpgi.1995.269.2.G262.
The pelvic flexure is the midpoint of the equine large colon that marks the junction of dorsal and ventral components. Previous studies of intraluminal pressure in this region indicate that it could be an important motility control center. The present study was undertaken to expand our knowledge of normal myoelectric activity around the pelvic flexure region. Eight bipolar silver wire electrodes were surgically fixed at 5-cm intervals to the colonic serosa of five adult horses, starting 30 cm oral to the pelvic flexure on the left ventral colon and ending 15 cm aboral to the pelvic flexure on the left dorsal colon (LDC). Recordings of myoelectric activity were done after feed had been withheld for 20 h or when the horses had been allowed to eat hay up to the time of the recording session. The activity was recorded on a polygraph, digitized, processed through a commercial graphics software package, and stored on magnetic tape for later analysis. Action potential activity was basically separated into long spike bursts (LSB) that were > or = 4 s duration and short spike bursts (SSB) that were < 4 s duration and quantified by a software program developed exclusively for the equine large intestine.(ABSTRACT TRUNCATED AT 250 WORDS)
骨盆曲是马的大结肠的中点，标志着背侧和腹侧部分的交界处。此前对该区域腔内压力的研究表明，它可能是一个重要的运动控制中心。本研究旨在扩展我们对骨盆曲区域正常肌电活动的认识。将八个双极银线电极以5厘米的间隔手术固定在五匹成年马的结肠浆膜上，从左腹侧结肠骨盆曲口侧30厘米处开始，到左背侧结肠（LDC）骨盆曲肛侧15厘米处结束。在禁食20小时后或在记录期间允许马匹吃干草时记录肌电活动。活动记录在多道生理记录仪上，数字化后通过商业图形软件包进行处理，并存储在磁带上以供后续分析。动作电位活动基本上分为持续时间≥4秒的长尖峰爆发（LSB）和持续时间<4秒的短尖峰爆发（SSB），并通过专门为马的大肠开发的软件程序进行量化。（摘要截短于250字）
