Analysis of the smooth pursuit system

Quantitative comparison between two different target movements, sinusoidal wave and triangle wave

Abstract

We examined the smooth pursuit systam using two different target movements, (sinusoidal wave and triangle wave) and compared the results quantitatively with a mini-computer (PDP 11/40). The target moved in the horizontal direction with 2 different amplitudes (10° and 15°) and with 4 different frequencies (0.2 Hz, 0.3Hz, 0.4 Hz, 0.5 Hz). The eye movements were recorded with ENG and analysed with PDP 11/40. Three parameters were obtained (movement difference, phase difference, and velocity difference). On normal subjects 3 parameters obtained from the triangle wave became greater than those obtained from the sinusoidal wave, as the target velocity increased. These findings demonstrated that the sinusoidal wave was suitable as the target movement for the examination of the smooth pursuit system.