Step-like field defects in Gilles de la Tourette syndrome

Abstract

Unique step-like defects are seen in people exhibiting Tourette syndrome and many of their blood relatives. These step-like field defects fluctuate, i.e., appear and disappear when visual fields are examined repeatedly on the same or different days. These changes in visual field do not follow any fixed pattern. The pathogenesis of such changes is not known. This condition is thought to be an anomaly of the dopaminergic system.

Key Words:

• visual fields
• nasal and temporal steps
• fluctuating field defects
• Goldmann perimetry
• Gilles de la Tourette syndrome
• neurotransmitters
• dopamine