Conclusions Most spina bifida patients lose the ability to voluntarily contract their external anal sphincter, presenting with pelvic floor dysfunction during straining maneuver and severe rectal sensation function damage. 结论大多数脊柱裂患者不能自主收缩肛门外括约肌,排便时表现为盆底功能紊乱型直肠肛管压力曲线,同时直肠感觉功能也受到严重损害。