pathological changes were confined to the nervous system and included degeneration of neurones and perivascular cuffing in the cerebrocortical grey matter , focal atrophy of the granular layer , focal spongiosus of the molecular layer and degeneration and loss of purkinje cells in the cerebellum and demyelination in the fibre tracts of the dorsal funiculus , mainly the fasciculus cuneatus and in the lateral and ventral corticospinal tracts .
C0027763
nervous system
C0018220
grey matter