Do you see the dancer turning clockwise or anti-clockwise?
If clockwise, then you use more of the right side of the brain and vice versa.

Most of us would see the dancer turning anti-clockwise though you can try to focus and change the direction; see if you can do it.

LEFT BRAIN FUNCTIONS
uses logic
detail oriented
facts rule
practical
safe

RIGHT BRAIN FUNCTIONS
uses feeling
“big picture” oriented
imagination rules
impetuous
risk taking

Taken from perthnow