SACCADIC REACTION-TIMES IN GAP OVERLAP PARADIGMS - A MODEL-BASED ON INTEGRATION OF INTENTIONAL AND VISUAL INFORMATION ON NEURAL, DYNAMIC FIELDS

The systematic variations of regular saccadic reaction times induced i n gap/overlap paradigms are addressed by a quantitative model. Intenti onal and visual information are integrated on a retinotopic representa tion of visual space, on which activity dynamics is related to movemen t initiation. Using a specific conception of ''motor preparation'', kn own effects of general warnings and fixation point on- and offsets are reproduced. Results of new experiments are predicted and the extent t o which fixation point offsets are specific to ocular responses is ana lyzed in the light of the exposed model architecture. Relations of the theoretical framework to neurophysiological findings are discussed.