The dura mater and the mastoid or craniotomy are then closed with a variety of materials, and the patient is observed in the intensive care unit. Because the balance fibers are cut suddenly, the surgery causes intense vertigo and imbalance for a few days requiring supportive medical care, medications for nausea and eventually physical therapy. A cane or walker may be needed for a while, depending on the patient’s health and activity level prior to the surgery. Once the patient is able to ambulate safely, he may be discharged home, but vestibular and balance therapy is continued on an out-patient basis to speed the patient’s recovery as much as possible. A return to full function occurs in most patients, although many do feel imbalanced when tired or stressed.