Conexiones entre los nervios mediano-cubital por electromiografía en Lima (Perú), 2016 / Connections between the median and ulnar nerves evidenced by electromyography in Lima, Peru, 2016

Introducción: Las conexiones son uniones frecuentes entre 2elementos anatómicos similares. En el antebrazo, entre los nervios mediano y cubital se presentan algunas de las más comunes, las cuales tienen importancia clínica debido a que producen variaciones en la inervación motora y sensitiva que pueden crear confusiones al momento de diagnosticar alguna enfermedad del nervio periférico. Método: Estudio descriptivo, transversal, observacional. Se estudió a un total de 127 pacientes mayores de 18 años, se les realizó electromiografía en miembros superiores y se obtuvo la frecuencia de presentación de las conexiones. Resultado: La conexión de Riche-Cannieu se presentó en un 16,5% del total de los pacientes estudiados. De estos, en un 42,9% se presentó en el brazo izquierdo y el 89,3% de forma aislada. La conexión de Marinacci fue la segunda en frecuencia, con un 15,7% de los casos, de los cuales un 40% se presentó en el brazo izquierdo y el 45,8% coexistía con otra conexión. La conexión de Berrettini fue la tercera en frecuencia con el 9,4%: el 50% se presentó en el brazo izquierdo y en un 53,3% de la muestra se halló de forma aislada. La conexión de Martin-Grüber fue la menos frecuente, con un 7,1% de nuestros casos, de los cuales el 44,5% se presentó de forma bilateral y el 90% asociado con otra conexión. Conclusión: Se concluye que, de los 4tipos de conexión estudiados, la más frecuente en nuestro medio es la conexión de Riche-Cannieu con predominio del brazo izquierdo y de forma aislada

Introduction: Connections are common communications between 2similar anatomical elements. Some of the most common are in the forearm between the median and ulnar nerves and are clinically important because they produce variations in motor and sensory innervation and can cause confusion when diagnosing peripheral nerve pathology. Method: Descriptive, cross-sectional, observational study. A total of 127 patients older than 18 years were studied, electromyography was performed on the upper limbs and the frequency of presentation of the connections was obtained. Result: The Riche-Cannieu connection was present in 16.5% of the total patients studied, of which 42.9% presented in the left arm and 89.3% in isolation. The Marinacci connection was the second in frequency with 15.7%, of which 40% was presented in the left arm and 45.8% coexisted with another connection. The Berrettini connection was the third in frequency with 9.4%, 50% presented in the left arm and 53.3% of the sample was found in isolation. Martin-Grüber's connection was the least frequent at 7.1% of our cases, of which 44.5% presented bilaterally and 90% associated with another connection. Conclusion: It is concluded that of the 4types of connection studied the most frequent in our environment was the Riche-Cannieu with predominance of the left arm and in isolation

Connections between the median and ulnar nerves evidenced by electromyography in Lima, Peru, 2016. / Conexiones entre los nervios mediano-cubital por electromiografía en Lima (Perú), 2016.

INTRODUCTION: Connections are common communications between 2similar anatomical elements. Some of the most common are in the forearm between the median and ulnar nerves and are clinically important because they produce variations in motor and sensory innervation and can cause confusion when diagnosing peripheral nerve pathology. METHOD: Descriptive, cross-sectional, observational study. A total of 127 patients older than 18 years were studied, electromyography was performed on the upper limbs and the frequency of presentation of the connections was obtained. RESULT: The Riche-Cannieu connection was present in 16.5% of the total patients studied, of which 42.9% presented in the left arm and 89.3% in isolation. The Marinacci connection was the second in frequency with 15.7%, of which 40% was presented in the left arm and 45.8% coexisted with another connection. The Berrettini connection was the third in frequency with 9.4%, 50% presented in the left arm and 53.3% of the sample was found in isolation. Martin-Grüber's connection was the least frequent at 7.1% of our cases, of which 44.5% presented bilaterally and 90% associated with another connection. CONCLUSION: It is concluded that of the 4types of connection studied the most frequent in our environment was the Riche-Cannieu with predominance of the left arm and in isolation.