http://dwi.austindefense.com/2006/09/articles/field-sobriety-tests/horizontal-gaze-nystagmus-hgn/vestibular-nystagmus-nhtsa-manual-2006/ Vestibular Nystagmus is caused by movement or action to the vestibular system. A. Types of vestibular nystagmus: Rotational Nystagmus occurs when the person is spun around or rotated rapidly, causing the inner fluid in the ear to be disturbed. If... en-us Copyright 2008 Tue, 09 Sep 2008 17:26:41 -0600 http://www.movabletype.org/?v=3.34 http://blogs.law.harvard.edu/tech/rss