EFO_0010631 (neurodevelopmental disorder with microcephaly, arthrogryposis, and structural brain anomalies) is an autosomal recessive disorder characterized by severe global developmental delay, severely impaired intellectual development with poor or absent speech, severe encephalopathy, microcephaly with simplified gyral pattern, hypomyelination, thin corpus callosum, mild cerebellar hypoplasia, brainstem hypoplasia, congenital arthrogryposis, dysmorphic features, and respiratory problems often leading to early demise.