They put a battery on top of the head of each subject, sending a small current through the surface of the brain toward a group of neurons in the primary motor cortex. (discovermagazine.com)
In the first step restraint geometry is rated using measurements of height and distance from the back of the head of a test dummy that represents an average - size man. (iihs.org)
Cut off about 1/4 inch off the top of the head of garlic and place it on a large piece of aluminum foil. (wineladycooks.com)