Information Processing in the Primate Basal Ganglia during Sensory-Guided and Internally Driven Rhythmic Tapping

• DOI: 10.1523/jneurosci.2679-13.2014
• Publication Date: 2014-03-12T17:44:44Z
• Authors: Ramón Bartolo; Luis Prado; Hugo Merchant
• Keywords: Local field potential; Tapping; Stimulus (psychology); Entrainment (biomusicology)

Gamma (γ) and beta (β) oscillations seem to play complementary functions in the cortico-basal ganglia-thalamo-cortical circuit (CBGT) during motor behavior. We investigated time-varying changes of putaminal spiking activity spectral power local field potentials (LFPs) a task where rhythmic tapping monkeys was guided by isochronous stimuli separated fixed duration (synchronization phase), followed period internally timed movements (continuation phase). found that both bands discharge rate cells showed an orderly change magnitude as function and/or serial order intervals executed rhythmically. More LFPs were tuned β- than γ-band, although different values preferred features represented single bands. Importantly, order, there strong bias toward continuation phase for β-band when aligned movements, synchronization γ-band stimuli. Our results suggest γ-oscillations reflect computations associated with stimulus processing, whereas β-activity involves entrainment large circuits, probably conjunction other elements CBGT, driven tapping.