Fig. 4
From: The diagnostic value of saccades in movement disorder patients: a practical guide and review
An algorithmic approach to movement disorders utilizing phenomenology and saccades. The approach starts with classifying the patient as hypokinetic or hyperkinetic. Various saccadic abnormalities can help lead to the final diagnosis in each phenomenology. *Cerebellar eye movement abnormalities including downbeat, upbeat, position, gaze-evoked nystagmus and saccadic dysmetria are also common in ataxia-telangiectasia (AT). Abbreviations: AOA1, ataxia with oculomotor apraxia type 1; AOA2, ataxia with oculomotor apraxia type 2; AT, ataxia telangiectasia; CBS, corticobasal syndrome; FA, Friedreich’s ataxia; GEN, gaze-evoked nystagmus; HD, Huntington’s disease; MSA, multiple system atrophy; NPC, Niemann-Pick type C; OMAS, opsoclonus-myoclonus ataxia syndrome; PD, Parkinson’s disease; SCA2, spinocerebellar ataxia type 2; SCA6, spinocerebellar ataxia type 6; SCA8, spinocerebellar ataxia type 8; SWJ, square wave jerks; VSGP, vertical supranuclear gaze palsy