[On the "amplitude sign" in nystagmus in miners and in spasmus nutans].
D003032:Coal Mining; D006801:Humans; D009759:Nystagmus, Pathologic / Q000502:physiology*; D009760:Nystagmus, Physiologic; D009784:Occupational Diseases; D010808:Physical Examination; D013035:Spasm / Q000502:physiology*; D013036:Spasms, Infantile
COAL MINING; NYSTAGMUS/physiology; OCCUPATIONAL DISEASES; SPASM/physiology