has material basis in germline mutation in CACNA1A CACNA1A-related complex neurodevelopmental disorder https://github.com/monarch-initiative/mondo/issues/5753 GARD:0027064 MONDO:0100254 A progressive complex neurodevelopmental condition caused by variants in the CACNA1A gene. Phenotypic onset (usually) occurs around age 1 and most often includes intellectual disability but can also include epileptic encephalopathy, benign paroxysmal torticollis of infancy and paroxysmal tonic upgaze psychomotor delay, learning difficulties, absence epilepsy, episodic ataxia, and hemiplegic migraines. Mendelian neurodevelopmental disorder complex neurodevelopmental disorder with motor features