Square wave oscillation the relationship of saccadic intrusions and oscillations

Abstract
A patient with progressive supranuclear palsy exhibited an extremely high number of square wave jerks. These usually sporadic saccadic intrusions were so frequent as to form a continuous oscillation. Such a phenomenon suggests an underlying commonality between sporadic saccadic intrusions (square wave jerks, saccadic pulses and double saccadic pulses) and saccadic oscillations (macro square wave jerks, MSO and flutter).