Nemaline Myopathy 5b, Autosomal Recessive, Childhood-Onset, is also known as nem5b. An important gene associated with Nemaline Myopathy 5b, Autosomal Recessive, Childhood-Onset is TNNT1 (Troponin T1, Slow Skeletal Type). Affiliated tissues include skeletal muscle, and related phenotypes are elevated circulating creatine kinase concentration and spinal rigidity