- Parkinson's disease: the thalamic components of the limbic loop are severely impaired by alpha-synuclein immunopositive inclusion body pathology. Rüb, U., Del Tredici, K., Schultz, C., Ghebremedhin, E., de Vos, R.A., Jansen Steur, E., Braak, H. Neurobiol. Aging (2002)