I can't think off top of head right now the name of breed. (caringpets.org)
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)
When I need to keep my hands free, there have been moments where I'm wearing three hats on top of my head in an airport. (bowsandsequins.com)