Mrs. X, 55 years old, was operated on for a C5-C6 cervical hernia 3 years ago via a right anterior approach. After a transient improvement, there is a reappearance of pain at the cervical level,
Mrs. X, 60 years old, comes to the doctor for extremely disabling scalp pain. These pains appeared following surgery for a brain tumour. She describes burns, associated with electric shocks of an entire hemi-cranium (red