[SACCADES AND PRESACCADIC SPIKE POTENTIAL DURING THE GAME OF TETRIS]

Saccades and microsaccades were studied during a game of Tetris using the method of EOG. In the experiments 19 players of different skill level were involved. EOG was recorded in monopolar mode with respect to the ear electrodes in 6-points around both eyes to account for the gaze displacement in 8-direction. The game of Tetris was on 3 difficulty levels. It is shown that each saccade on EOG preceded by a sharp negative potential of 10-15 ms or «pre-saccadic peak». Its parameters are very stable at the given person, while EOG parameters of themselves saccade vary from their direction. When bipolar registration peak is not detected. The peak amplitude does not depend on the saccade direction, but correlates with saccade amplitude. It is assumed that the peak generators are neuromuscular synapses. Everything else being equal men were characterized by shorter saccades and greater percentage of microsaccades than women. On the middle level of difficulty at the optimal level of attention (but without the stress) are observed smallest saccades. For all players have dominated vertical saccades from the block to the glassful bottom and backward. In the transition from light to hard level for experienced players is increasing the proportion of «extra» non-vertical saccades, while the proportion of beginners «extra» saccades always relatively high.