Exaggerated hippus

Clinic

• Pupillary hippus, also known as pupillary athetosis, is spasmodic, rhythmic, but regular dilating and contracting pupillary movements between the sphincter and dilator muscles.
• Pathologic hippus, the phenomenon of increased oscillation or their amplitude
• It is sign of common pathway of frontal lobe dysfunction

Causes

• Aconite poisoning
• Altered mental status
• Trauma
• Cirrhosis
• Renal disease