The Mayfield headholder is used to
stabilize the head during surgery on the brain. It consists
of a clamp with three sterile pins which insert through the scalp
into the outer table of the skull. Although the device looks
painful, it is extremely rare for a patient to ever even notice
that the pins were in the skull. The head holder is affixed
to the head when the patient is asleep, and the pinsites show as
small punctures in the scalp, and generally heal without any difficults.