Figure 3
From: Dynamic modulation of the perceptual load on microsaccades during a selective spatial attention task
The temporal dynamics of the microsaccade amplitude and the modulations of perceptual load on the microsaccade amplitude during different time periods. (A–C,E–G) Temporal comparison of the microsaccade amplitude between the easy (blue) and hard (pink) conditions for monkeys G and N. For each monkey, the microsaccade amplitude demonstrated a transient increase around the time of the minimum rate seen in the earlier figure after the cue or stimulus appearance and the target color change onset. The horizontal dashed lines represent the average amplitude during the period of Control. The black lines at the bottom of each plot demonstrate the periods in which the microsaccade amplitude under the two conditions differed significantly (p < 0.05, Student t test). The gray rectangles are defined as in Fig. 2. (D,H) Measures of the perceptual load modulation on the microsaccade amplitude during different periods. For both monkeys, the top panels show the average microsaccade amplitude during the easy (blue) and hard (pink) tasks in the four periods. The bottom panels show the DMI ratios of the microsaccade amplitude within the four time periods. Error bars indicate SEMs, which are defined in Fig. 2.
