Just paying attention on how I open my mouth. My habitual is to do it from the right side perspective. It was impossible for me to sense that until relatively recently. My movement 'image' only included the right side.When I include an active image of the left side in that image there is a much different feel of the left jaw. It is almost as if I opening against more resistance but somehow more 'correct'. There is a cooperation in the muscles and structures.
I do not know what other people do but I imagine there is a wide spectrum of movement 'images'.