For other uses, see Non-fiction (disambiguation). Non-fiction or nonfiction is content (sometimes, in the form of a story) whose creator, in good faith, assumes responsibility for the truth or accuracy of the events, people, and/or information presented. In contrast, a story whose creator explicitly leaves open if and how the work refers to reality is usually classified as fiction.
For each eye, six muscles work together to control eye position and movement. Two extraocular muscles, the medial rectus and lateral rectus, work together to control horizontal eye movements (Figure 8.1, left). 1  Contraction of the medial rectus pulls the eye towards the nose (adduction or medial movement).
Below is a table of each of the extraocular muscles and their innervation, origins and insertions, and actions. Note that the muscles may have minor actions in neutral, adduction, or abduction, but the primary action is shown in bold.he actions of the six muscles responsible for eye movement depend on the position of the eye at the time of muscle contraction. Four of the extraocular muscles control the movement of the eye in the four cardinal directions: up, down, left and right.