KS-5
Embouchure dystonia is a focal task-specific dystonia that affects the muscles (esp. lips and jaw muscles) used to play wind instruments. The musician is looking at the sheet music, or playing by memory.
Musician's focal dystonia is a task-specific disorder that mainly affects the upper extremity (especially the hands) esp. of violin and guitar players. The musician is looking at the sheet music, or playing by memory.
"Dartitis" affects the hands muscles (inability to release the dart), and the player is looking at a non-moving target.
Pitchers with throwing "yips" have an inability to release the ball, while looking at the catcher's glove.
How is visual processing involved?
When we remember things, what do we do. Do we use visual reference in the memory recall. At the same time when we are in thought, what happens to our visual processing. Even though our eyes are open, what do we see. When we listen to a conversation, or listen intently for a sound or noise what do we see. Our hearing is now central processing. At the same time our eyes are open, but we don't register what we are looking at. When we go into a deep tired stare, what happens to our senses processing. Our eyes are open, and basically the brain stops processing our senses all together until a noise, movement, or touch sensation occurs, and we snap out of it.
The yips I believe are the same thing. Thought, doubt, confidence in succeeding at what we set out to do gets in the way of visual concentration. Which is basically lack of visual processing on the target. The key here are these lines, "while looking at the catcher's glove", "and the player is looking at a non-moving target". The eyes may be facing that direction, but at the same time the visual processing can be cut off. When that target disappears at the split second of release, like in pulling a trigger on a moving target, the motor skill signals get sent of into la la land.
When we first learn an instrument, do we use visual reference to make sure our fingers are in the right place to play a note or chord. Once that is repeated many times it can be a memory thing, but is there still visual reference going on with that memory recall.
On the instrument thing, think about that in the shooting sports world of moving targets. Or any sport involved with moving targets. If our hands can move to where they have to be without looking at them, then isn't looking at the target with full central or conscious processing absolutely critical to hit a moving target. Let the eyes feed as much information as possible, and the body can do what it has to do, and when.
Let that super computer in our skull figure it out.
One more thing about our vision, in order for our eyes to see a stationary image, they have to move the central focus very quickly to another focus point in order to see that image. Otherwise it will slowly disappear. Also, if there is movement involved with our central focus such as on a moving target our eyes will stay focused without diminishing because the background will appear to be moving..
Next time when you have a conversation with someone close to you, watch their eyes closely when you are speaking. They zing back and forth a very short amount, side to side very rapidly while listening to you talk. I wonder why.