Neurodevelopmental Disorder with Microcephaly, Arthrogryposis, and Structural Brain Anomalies, also known as nedmaba, is related to microcephaly and arthrogryposis syndrome. An important gene associated with Neurodevelopmental Disorder with Microcephaly, Arthrogryposis, and Structural Brain Anomalies is SMPD4 (Sphingomyelin Phosphodiesterase 4). Affiliated tissues include brain and cortex, and related phenotypes are global developmental delay and progressive microcephaly