Clavero Juan A, Golanó Pau, Fariñas Oscar, Alomar Xavier, Monill Josep M, Esplugas Mireia
Department of Radiology, Diagnosis Médica, C/Corcega 345, 08037 Barcelona, Spain.
Radiographics. 2003 May-Jun;23(3):593-611. doi: 10.1148/rg.233025079.
Extension of the fingers is a complex function carried out by simultaneous action of extrinsic and intrinsic muscles, as well as retinacular structures in the dorsum of the wrist, hand, and fingers that support and coordinate the action of the muscles. The extensor mechanism of the fingers is divided into topographic zones, which extend from the forearm to the distal phalanx. Magnetic resonance (MR) imaging shows in detail the musculotendinous and retinacular structures of the extensor apparatus. In the different extensor zones, MR imaging findings are similar to those seen macroscopically in anatomic sections. Understanding of and familiarity with the extensor anatomy of the hand and fingers by the radiologist is crucial for better assessment of pathologic conditions with MR imaging and optimization of this modality as a diagnostic tool. Extensor tendon injuries and tenosynovitis represent clinical situations in which knowledge of this anatomy is useful for the clinical radiologist.
手指伸展是一项复杂的功能，由外在肌和内在肌以及腕背、手背和手指背侧的支持并协调肌肉动作的支持带结构协同完成。手指的伸肌机制分为从前臂延伸至远节指骨的不同解剖区域。磁共振（MR）成像能详细显示伸肌装置的肌肉肌腱和支持带结构。在不同的伸肌区域，MR成像表现与解剖切片中肉眼所见相似。放射科医生对手和手指伸肌解剖结构的了解和熟悉程度，对于通过MR成像更好地评估病理状况以及优化这种作为诊断工具的检查方法至关重要。伸肌腱损伤和腱鞘炎是临床情况，在这些情况下，了解这种解剖结构对临床放射科医生很有用。
