“…When strategic memory retrieval is predominantly driven by a strategy using spatialassociative representations, brain regions known to be involved in higher order visual processing and mental imagery like the cuneus and precuneus seem to be involved (Fletcher et al, 1995(Fletcher et al, , 1996Kosslyn et al, 1995;Wheeler et al, 2000). In contrast, the thalamus as well as the basal ganglia, in particular their output structure, the globus pallidus, are involved in forms of memory in which temporal information is crucial, for example in implicit learning of motor as well as nonmotor sequences (Forkstam and Petersson, 2005;Forkstam et al, 2006;Lehericy et al, 2005;Packard and Knowlton, 2002;Smith and McDowall, 2006;Vakil et al, 2000). In line with this, patients with basal ganglia degeneration like Parkinson's disease show deficits in implicit sequence learning (Smith and McDowall, 2006) and strategic spatial location memory (Pillon et al, 1998).…”