has material basis in germline mutation in DAGLA movement disorder benign paroxysmal tonic upgaze of childhood with ataxia https://github.com/monarch-initiative/mondo/issues/9176 https://www.malacards.org/card/neuroocular_syndrome_2_paroxysmal_type A rare paroxysmal movement disorder characterized by episodes of sustained, conjugate, upward deviation of the eyes and down beating saccades in attempted downgaze (with preserved horizontal eye movements) which is accompanied by ataxic symptomatology (unsteady gait, lack of balance and movement coordination disturbances) in an otherwise healthy individual. Bilateral vertical nystagmus is associated. Symptoms generally disappear spontaneously within 1-2 years after onset. OMIM:168885 MONDO:0008206 UMLS:C1868576 Ouvrier Billson syndrome Orphanet:1179 SCTID:763127004 MESH:C566817 MEDGEN:401473 GARD:0004176 neuroocular syndrome 2, paroxysmal type Ouvrier-Billson syndrome neuroocular syndrome