A complex system of nerves and muscles enables the human eye to blink, gaze, and shift focus. The trochlear nerve is one of six cranial nerves that carry electrical impulses from the brain to the eye.

AFTER SEVERAL YEARS of seeing skilled bodyworkers and body experts — sometimes with pain from an injury, often without — my advice on bodywork is to go before anything hurts. And if something hurts?

The craniofacial skeleton encases the brain and sensory organs, and is important for the functioning of the digestive and respiratory tracts. It is derived largely from the neural crest, a migratory ...