It consists in the implantation of a brain sensor for the registration of the intracranial pressure. The sensor is a few millimeter-width fiber usually attached to the skull with a threaded bolt. The objective of this technique is to detect abnormal increases in the intracranial pressure that require specific treatment. An abnormal increase in the intracranial pressure is a neurosurgical emergency. It may cause neurological deficits and irreversible brain damage.