肘管近端解剖引起尺神经受压没有详细报道。我们研究发现肘管近端顶壁由纤维带组成，称为肘管横韧带，宽约４ｍｍ，从内上髁至鹰嘴，远侧延伸到尺侧屈腕肌腱膜。它是肘后肌肱骨内上髁附着处的延伸部分。其功能是保持尺神经的位置。其解剖变异可以解释尺神经病变的类型。肘管横韧带可分四型。Ⅰ型可致尺神经脱位；Ⅱ型正常；Ⅲ型可随肘屈曲引起动力性神经受压；Ⅳ型可引起尺神经静力性受压。 The proximal anatomy of the ulna causes ulnar nerve compression without a detailed report. Our study found that the proximal elbow wall composed of fiber bands, called the elbow transverse ligament, width of 4mm, from the medial condyle to the olecranon, distal to the ulnar flexor tendon fascia. It is an extension of the posterior humerus medial epicondyle attachment. Its function is to maintain ulnar nerve position. Anatomic variations can explain the type of ulnar neuropathy. Elbow transverse ligament can be divided into four types. Type I can cause ulnar nerve dislocation; type Ⅱ normal; type Ⅲ with the elbow flexor can cause dynamic nerve compression; type Ⅳ can cause ulnar nerve compression.