Ten children with cerebral palsy are presented on whom stereotaxic operations on the central nervous system were performed with the aim of ameliorating athetosis and spasticity. Tere were seven alert and co-operative children with spastic hemiplegia or diplegia, of whom six received benefit from thalamotomy or dentatotomy. The seventh, a child with diplegia, had improvement of his left lower limb, but the right became worse. One child with spastic diplegia, in whom a thoracic meningocoele had been closed at birth, was not improved by bilateral dentatotomy. Two severely quadriplegic children each had bilateral dentatotomy; one was a child with dystonic and spastic quadriplegia. In both cases the resulting reduction in tone and extensor spasm rendered the nursing of these patients much easier. The place of stereotaxic surgery in the central nervous system in the management of children with cerebral palsy is discussed. We suggest that in selected cases the stereotaxic operation should be performed early in order to gain the greatest benefit. Stereotaxic surgery should be regarded as an integral part of the management which involves close co-operation of paediatrician, physiotherapist, neurosurgeon and orthopaedic surgeon.