Fig. 9.

Model of cerebrocerebellar circuit proposed to be involved in verbal working memory. In addition to the phonological loop between frontal lobe structures (such as Broca’s area, comprising the articulatory control system and represented by adashed line) and temporal-parietal structures (such as the supramarginal gyrus, comprising the phonological store and represented by a solid line), a parallel path from these structures enters the cerebellar cortex via the pontine nuclei. Discrepancies between the actual and intended phonological output are computed and used to update a feedforward articulatory rehearsal command to the frontal cortex via dentatothalamic projections.PN, Pontine nuclei; Thal, thalamus.