Fast oscillations in cortical-striatal networks switch frequency following rewarding events and stimulant drugs.

ABSTRACT: Oscillations may organize communication between components of large-scale brain networks. Although gamma-band oscillations have been repeatedly observed in cortical-basal ganglia circuits, their functional roles are not yet clear. Here I show that, in behaving rats, distinct frequencies of ventral striatal local field potential oscillations show coherence with different cortical inputs. The approximately 50 Hz gamma oscillations that normally predominate in awake ventral striatum are coherent with piriform cortex, whereas approximately 80-100 Hz high-gamma oscillations are coherent with frontal cortex. Within striatum, entrainment to gamma rhythms is selective to fast-spiking interneurons, with distinct fast-spiking interneuron populations entrained to different gamma frequencies. Administ

SUBMITTER: Berke JD 

PROVIDER: S-EPMC2778242 | biostudies-literature | 2009 Sep

REPOSITORIES: biostudies-literature