Complex sentence: Pradhan has done research on Hirayama type monomelic amyotrophy, a disease described by Dr. Hirayama in 1959, and, in 1977, published a report explaining the features of diagnostic magnetic resonance imaging.
Split into simpler sentences: Pradhan has done research on Hirayama type monomelic amyotrophy, a disease described by Dr. Hirayama in 1959. In 1977, he published a report explaining the features of diagnostic magnetic resonance imaging.