Task: Translation
Input (English): A 65-year-old woman consulted due to weakness in the right hand that has spread in a few months to other muscle areas of both arms and legs, predominantly distal. In the exploration there is atrophy and fasciculations in different metameric territories with preserved sensitivity. There is a bilateral Babinski sign. What is the diagnostic test that would confirm the diagnosis of suspicion?
Output (Spanish): Una mujer de 65 años consulta por debilidad en la mano derecha que se ha extendido en pocos meses a otros territorios musculares de ambos brazos y piernas, de predominio distal. En la exploración hay atrofia y fasciculaciones en distintos territorios metaméricos con sensibilidad conservada. Existe un signo de Babinski bilateral. ¿Cuál es la prueba diagnóstica que confirmaría el diagnóstico de sospecha?