reward-related gamma oscillations in ventral striatum, but in contrast to Masimore et al. (2005), only a weak relationship to movement parameters. While these results do not imply that gamma oscillations in ventral striatum are locally generated, preliminary reports have found phase relationships between individual ventral striatal units and the gamma rhythm (Berke, 2005; Kalenscher et al., 2008), suggesting that at least, ventral striatal LFPs are related to spiking activity, but these relationships have not been examined on a population level. Thus, while there are preliminary suggestions, the relationship between ventral striatal LFPs to task-relevant variables and spiking activity is currently poorly understood.
