Rayan G M, Murray D, Chung K W, Rohrer M
University of Oklahoma Health Sciences and Baptist Medical Centers, Oklahoma City, USA.
J Hand Surg Br. 1997 Oct;22(5):585-90. doi: 10.1016/s0266-7681(97)80351-8.
The anatomy of the sagittal bands was studied in 56 cadaver digits. The sagittal band is part of an extensor retinacular system which is integrated with the extrinsic and intrinsic musculotendinous structures. The extensor retinacular system is a single unit with radial and ulnar components and has transverse, sagittal and oblique fibres. The transverse-sagittal fibres, along with the palmar plate, form a closed cylindrical tube which surrounds the metacarpal head. The oblique fibres form the triangular lamina distal to the sagittal band. The radial component of the sagittal band is often thinner and longer than the ulnar component. The sagittal band envelops the extensor digitorum tendon and the superficial fibres are thinner than deep fibres, especially in the central digits. The central digits have palmar soft tissue confluence on each side consisting of the sagittal band, palmar plate, annular pulley and deep transverse metacarpal ligament. The sagittal band also appears to envelop the superficial interosseous tendons on both sides. Our findings explain the propensity for radial sagittal band injuries and suggest that the sagittal band is the primary stabilizer of the extensor digitorum at the metacarpophalangeal joint.
对56个尸体手指的矢状带解剖结构进行了研究。矢状带是伸肌支持带系统的一部分，该系统与外在和内在的肌腱结构整合在一起。伸肌支持带系统是一个具有桡侧和尺侧成分的单一单元，有横向、矢状和斜向纤维。横向矢状纤维与掌板一起形成一个围绕掌骨头的封闭圆柱形管。斜向纤维在矢状带远侧形成三角形薄片。矢状带的桡侧成分通常比尺侧成分更薄更长。矢状带包绕指伸肌腱，其浅层纤维比深层纤维更薄，尤其是在中间手指。中间手指两侧有掌侧软组织融合，由矢状带、掌板、环状滑车和掌骨深横韧带组成。矢状带似乎也在两侧包绕骨间背侧肌腱。我们的研究结果解释了桡侧矢状带损伤的倾向，并表明矢状带是掌指关节处指伸肌的主要稳定结构。
