求翻译：许多神经系统疾病患者因合并膀胱机能障碍仰卧位时下肢痉挛性麻痹，肌张力亢进，要保持仰卧位两腿屈曲外展的姿势极为困难是什么意思？

Nervous system disease in patients with spastic paralysis in the supine position because of the merger of bladder dysfunction, muscle hypertonia, to maintain the position of supine legs buckling outreach is extremely difficult

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When many nervous system disease patient merge urinary bladder function barrier supine decubitus lower limb saccadic is lacking in vigilance, the myo- tensity hyperfunction, must maintain the posture which the supine decubitus two leg flexures abduct to be extremely difficult

Many diseases of the nervous system with bladder dysfunction in patients with lower limb spastic paralysis when supine, muscle hypertonia, to remain supine leg buckled outreach position extremely difficult

many diseases of the nervous system due to combined patient bladder dysfunction when supine leg cramps, numbness, muscle tension, and supine position to keep the legs buckling outreach position is extremely difficult