The nerves controlling the eyes connect directly to the brain.

If the nerves controlling the eyes are damaged, double vision can result.

The nerves control motor function and various sensations, such as pain.

The nerves control various sensations and the ability to make muscles contract.

The sympathetic nerves control the adrenals' activity, so they are really part of the same system.

The intestinal nerves control muscles that move food through the digestive system.

Researchers think the brain, particularly in the young, is learning about what nerves control what specific muscles when asleep.

The researchers hypothesized that nerves in the lungs controlled this relaxation.

"I've thought of that, and I'll paralyze the nerves controlling those muscles first, so he'll have to breathe water whether he wants to or not."

Controlling this activity involves nerves, muscles, the spinal cord and the brain.