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Las variaciones del nervio cubital ulnar en la muneca son extranas, pero todavia tienen importancia clinica. Durante una diseccion de rutina de la mano derecha de un hombre europeo de 67 anos, se encontro en la muneca  un nervio ulnar aberrante. Su rama superficial se bifurco y formo un lazo completo alrededor del gancho del hueso ganchoso. Los nervios sensoriales de los dedos surgieron de las diferentes partes de este lazo. La presencia de dicha variacion predispone al nervio a una neuropatia por compresion incluyendo una lesion accidental ocasionada durante las intervenciones quirurgicas. Ulnar nerve variations in the wrist are rare but still have clinical importance. In the course of a routine dissection of the right hand of a 67-y-old Caucasian male cadaver an aberrant ulnar nerve at the wrist was found. Its superficial branch bifurcated and formed a complete loop around the hook of the hamate bone. The sensory digital nerves arose from the different parts of this loop. The presence of such a variant neural loop predisposes the nerve to compression neuropathy and accidental injury during surgical interventions.

revista argentina de anatomía clínica

A CASE OF DISTAL ULNAR NERVE VARIATION – PRESENCE OF SENSORY LOOP AROUND THE HOOK OF THE HAMATE BONE. Un caso de variación distal del nervio ulnar – Presencia de un bucle alrededor del gancho del hueso ganchoso