Cortical gamma oscillations (20–80 Hz) predict increases in focused attention, and failure in gamma regulation is a hallmark of neurological and psychiatric disease; however, what induces this activity band is unclear. Here, by using a cell-type targeted optogenetic approach, it is revealed that gamma oscillations can be driven by specific activation of fast-spiking interneurons in vivo, and that sensory input relative to these oscillations can determine the extent of evoked cortical activity.
- Jessica A. Cardin
- Marie Carlén
- Christopher I. Moore