How did the bodies of animals, including ours, become such fine-tuned movement machines? How vertebrates coordinate the eternal tug-o-war between involuntary reflexes and seamless voluntary movements ...

The reflexes of the eye are automatic adjustments your eyes make to help you see and keep them from being damaged. They can respond to light and dark, adjusting how much light enters the retina.

The test is based on how your hand's reflexes respond to a quick flick of a fingernail. What Are the Hoffman Test and Hoffman's Sign? The Hoffman test determines whether a person has spinal cord ...