Course Pattern of the Muscular Branch of the Median Nerve in Sri Lankans Hand Curso del Patr車n del Ramo Muscular del Nervio Mediano de la Mano en Sri Lankenses

作者：Kithsiri J Senanayake; Sujatha Salgado; Ranil Fernando

来源：International Journal of Morphology, 2009.

• Nervio mediano
• Ramo muscular
• Retinaculo flexor
• Mano
• Sri Lanka
• Median nerve
• Muscular branch
• Flexor retinaculum
• Hand
• Sri Lankans

Transligamentous variant of the recurrent motor branch is having a higher risk of getting damage during both endoscopic and open carpal tunnel releases. The incidence of the transligamentous variant is about 7% to 80% world wide. This wide variation of the incidence could be due to the failure of identification of the distal edge of the flexor retinaculum from the obliquely oriented fascia that runs from the distal edge. We used two criteria to identify the distal edge; the abrupt change in the thickness of the flexor retinaculum and its colour change in cross section. The incidence of transligamentous variant is rare and the reported high incidence could be due to an error in identification of the distal edge of the flexor retinaculum as shown by Kosin (1998). Las variantes transligamentosas del ramo motor recurrente tienen un mayor riesgo de recibir da os durante la endoscop赤a y liberaci車n abierta del t迆nel carpiano. La incidencia de la variante transligamentosa es de, aproximadamente, 7 a 80% en todo el mundo. Esta amplia variaci車n de la incidencia podr赤a deberse a la falla en la identificaci車n del borde distal del retin芍culo flexor de la fascia de orientaci車n oblicua que va desde el borde distal. Hemos utilizado dos criterios para identificar el borde distal, el brusco cambio en el grosor del retin芍culo flexor y su cambio de color en la secci車n transversal. La incidencia de la variante transligamentosa fue rara y el informe de la alta incidencia podr赤a deberse a un error en la identificaci車n del borde distal del retin芍culo flexor, como lo demuestra Kosin (1998).