Progressive brain damage and alterations in dendritic arborization after collagenase-induced intracerebral hemorrhage in rats.

Intracerebral hemorrhage (ICH) was widely believed to be a monophasic event whereby cell death occurs from the initial space-occupying effects of the hematoma. However, we now know that secondary degenerative events contribute to delayed cell death, functional impairment and clinical deterioration. In three experiments, we further characterized the long-term maturation of injury in the collagenase model of striatal ICH in rat.