Mitochondria contains special enzymes that muscle cells need to utilize oxygen.
The primary visual cortex is what sends information to the secondary visuals, which are important for color, motion, and depth perception. If the primary visual is damaged, then it can cause problems for the secondary visuals, which are important for the three reasons listed ^.
The answer is obsessive-compulsive disorder. Compulsive and usually unwanted thoughts and actions (rituals) are the common features of the disorder. Although OCD is usually associated with repeating the actions over and over, such as obsessive hand-washing or having to flick a light switch a certain number of times, many people who suffer from OCD struggle with frequent unwanted thoughts and images.
