Barre-Lieou Sign is used to assess the integrity of the vertebral arteries. A positive Barre-Lieou Sign may indicate Vertebrobasilar insufficiency (VBI).
Patient seated, slowly rotates head from side to side
Positive Barre-Lieou Signt
Positive Pre-syncope, vertigo, nystagmus, visual changes and/or nausea = May indicate Vertebrobasilar insufficiency
Patient’s eyes must be opened to observe for the presence of nystagmus.