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许多周围神经受卡压都会出现典型下位运动神经元症状：
无力或是迟缓性瘫痪（Weaknessorflaccidparalysis）
自发性收缩（Fasciculation）
肌萎缩症（Muscleatrophyovertime）
反射减退/无反射（Hyporeflexia/areflexia）
在诊断上的例外如“肌萎缩性侧索硬化症AmyotrophicLateralSclerosis(ALS)”临床表现可能会出现上下肢的上下位运动神经元的矛盾现象。也请务必排除其他可能的鉴别诊断:例如神经肌肉性疾病—重肌无力症(MG)，虽然典型(MG)现象会从头部肌肉开始，但临床上还是出现过例外的案例。若肌肉力量越用越无力，这有可能是一个警讯。尺神经解剖学
尺神经是臂神经丛内侧束的主要延伸。通常源自于C8与T1神经根。
在腋窝处，神经在腋动脉和静脉之间运行。
在手臂处，神经位于肱动脉和静脉之间，与正中神经共享神经及血管束。他在肱三头肌内侧头的内侧面下行。尺神经只支持前臂与手的肌肉,不支持上臂。
运动支持
所有的（手部小型内跗肌smallhandintrinsicmuscles）包含（ABP-正中神经）、尺侧腕屈肌（Flexorcarpiulnaris）、小指及无名指的长屈肌、深指屈肌IIIIV（FlexordigitorumprofundusIIIIV）。
感觉支持
手掌内侧、第五指及第四指的内半侧。（下图蓝色区域）
Andy医生小贴士“尺神经常见的卡压综合症有4个，而其中肘管综合症与尺侧腕屈肌卡压造成原因类似。而其中的肘管综合症也是最常见的周围神经卡压之一。尤其发生在＂用手腕工作的人群中＂，它与正中神经的旋前圆肌综合症有时会伴随着一起出现，要注意多灶性神经病变的可能性”24综合症之5：尺神经沟神经卡压
在尺神经沟的尺神经损伤。
在肘部也称为神经损伤。
通常由尺神经沟压迫原因一般如下：
重复性创伤，如习惯性倚在肘部；
创伤性关节畸形；
肱骨远端骨折；
肘错位；
神经复发性半脱位；
退化性关节疾病；
外翻畸形；
手术固定；
尺神经损伤通常认定属于缓慢性尺神经麻痹（TardyUlnarPalsies）。
尺神经沟损伤应当与肘管综合征损伤区别开来，其临床特征如下：
尺神经包括手背的感觉分布：疼痛、麻木或感觉异常；
肘部敏感；
顶部背侧和尺侧神经支配的手部肌肉的无力和损耗，包括內跗肌(intrinsicmuscles) 尤其是第一指；
尺侧腕屈肌和指屈肌无力在这种情况下可能發生。
Andy医生小贴士“疼痛位置与检测尺侧屈肌肌力是个诊断上快速简单的好方法，但也要注意例外的案例”24综合症之6：肘管综合症
损伤形成在连接肱骨和尺侧腕屈肌尺骨头的腱弓。位于内上髁(medialepicondyle)远程1-2厘米；
肘部弯曲肘管管会缩窄；
双侧压迫是常见的；
在此部位做手术是为了降压（de白癜风名医医院治疗白癜风费用
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