[Torsion movements of the human eye. III. Rapid phase of torsion].

Kinematic characteristics of torsional saccades and their peculiarities were investigated. The torsional saccades were found to occur simultaniously in both eyes and had the same size and duration. It was shown that the peak velocity and the duration of the saccades depend on their amplitudes. The number of the saccades decreased and their sizes increased when the head tilts were faster. In the case intervals between the saccades decreased up to 20-30 ms. The likeness of the torsional movements and rotatory nistagmus was discussed.