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作者在尸体解剖过程中发现副拇长伸肌1例,该标本为成年男性左上肢。在拇长伸肌腱尺侧,有一纤细副拇长伸肌腱,向近端追踪,该肌起自伸肌总起点,在前臂浅层指总伸肌桡侧与指总伸肌向远端并行走行,其肌腱在伸肌支持带处进入腕背第4个鞘管,位于该鞘管最桡侧,出鞘管后斜向桡侧远端跨越桡侧腕长伸肌腱和桡侧腕短伸肌腱,走向拇指掌指关节背侧,部分腱纤维止于拇指掌指关节背侧纤维组织,其余腱纤维并行于拇长伸肌腱尺侧,止于拇指远节指骨
In the process of autopsy, the author found 1 case of paraxial extensor, which was left upper limb of adult male. In the ulnar long extensor tendon ulnar, there is a slender Vice thumb extensor tendon, tracing to the proximal end, the muscle from the extensor total starting point in the forearm superficial extensor refers to the radial extensor and the total extensor to the distal parallel walk , The tendon in the extensor support band into the wrist at the fourth sheath, located in the sheath on the most radial side, out of the sheath radial oblique distal radial long wrist extensor tendon and radial wrist short extensor tendon , To the dorsal side of the thumb metacarpophalangeal joint, part of the tendon fiber ends in the dorsal side of the thumb metacarpophalangeal joint, and the rest of the tendon fibers parallel to the ulnar long extensor tendon ulnar, distal thumb phalanges