Figure 1

The movement patterns of the figure of eight and “the Fly” tests for assessing trajectory movement control. A: Figure of eight. B: Movement pattern 1A and 1B in the Fly test C: Movement pattern 2A and 2B in the Fly test (adopted from Kristjansson et al. (2010)). Mean cervical ROM in the performance of the figure of eight was 11° flexion/extension and 24° rotation in the horizontal plane. Mean cervical ROM in the Fly test was 14° flexion/extension and 10° rotation in the horizontal plane in movement pattern 1A, and 15° flexion/extension and 10° rotation in the horizontal plane in movement pattern 2A. Movement pattern 1B and 2B, which was the same patterns as 1A and 2A, respectively, had twice as much cervical ROM (movement ratio head to cursor 2:1).