A stereotaxic apparatus and technique for electrode placement in diencephalic nuclei of sexually immature rainbow trout of 120-140 g body weight is described. An atlas of nuclei in the diencephalon is also presented.

After the introduction of levodopa drugs in the late 1960s, the number of thalamotomies fell dramatically world wide. However, as the Parkinsonian tremor proved rather resistant to levodopa treatment, the interest in this operation has been reviewed. During 1978-86, 51 stereotaxic thalamotomies were performed in 48 patient in our department. Thirty three of these patients had Parkinsonism, nine...