Changes of fixations between snapshots only restrict the resolution with which individual face parts can be processed but don't imply an exclusive processing of the face part fixated on, as would be the case in featural processing.
Mean time to fracture union for the 139 open fractures that did not required a change of fixation method or bone graft was 25 weeks (ranged 17 32, median time 28); in the 84 closed fractures this was 21 weeks (ranged 14 31, mean time 23) (Figs. 1, 2, 3; Table 1).
It is recognized that any change of fixation procedure has the potential to change the appearance of the tissues and that a larger number of tissues will need to be examined before general utility can be validated.
The colour change of fixation target was the go-signal for the monkey to release the home-button and perform an arm movement towards the target button, then to press it.
The data show that the average button-press accuracy after a fixation point color change within runs that were included in the analysis was 78.73±2.57% and the average reaction time (RT) was 848.04±53.47 ms. When analyzing color changes of the fixation point as events, the results show that our fixation task does not affect the BOLD signal in the retinotopic areas tested (data not shown).
In the present experiments, we used orthogonal tasks requiring participants to fixate and either to detect color changes of the fixation marker (Experiment 1) or to count such changes and report the total number at the end of a run (Experiment 2).
In addition, when analyzing motor responses to the color changes of the fixation point as events, the results also show no BOLD signal modulation in the retinotopic areas tested (data not shown).
In this experiment, subjects fixated on a central cross and responded with a fast button press to subtle changes of the fixation cross from white to black.
Brief colour changes of the fixation cross (300 ms duration) occurred at frequent and random intervals, and participants were given a window of 1 s to press a button connected to the stimulus computer via a parallel port, being specifically instructed not to miss any red crosses or move their eyes around the screen.
At least 70 times during a campimetric visual field test, fixation accuracy was tested by an isoluminant change of the fixation point.
