In situhybridization for c-fos mRNA expression 2 hr after microinjection of kainic acid into the cerebellum of wild-type mice. Representative sections from regions implicated in dystonia and from areas of c-fos induction are shown, including striatum and cortex (STR), hippocampus (HPC), red nucleus (RN), locus ceruleus (LC), and cerebellum (CB). Induction of c-fosmRNA expression was observed in the cerebellum, red nucleus, and locus ceruleus.