Subthalamic and nigral neurons are differentially modulated during parkinsonian gait by Gulberti, A, Wagner, JR, Horn, MA, Reuss, JH, Heise, M, Koeppen, JA, Pinnschmidt, HO, Westphal, M, Engel, AK, Gerloff, C, Sharott, A, Hamel, W, Moll, CKE, Pötter-Nerger, M