Congenital Myopathy 4a, Autosomal Dominant, also known as nemaline myopathy 1, is related to congenital multicore myopathy with external ophthalmoplegia and congenital myopathy 1b, autosomal recessive. An important gene associated with Congenital Myopathy 4a, Autosomal Dominant is TPM3 (Tropomyosin 3), and among its related pathways/superpathways are Sertoli-Sertoli Cell Junction Dynamics and Cardiac conduction. Affiliated tissues include skeletal muscle and heart, and related phenotypes are hypotonia and type 1 muscle fiber atrophy