As an example of how neuronal oscillations can impact cortical processing, Figure 2A–E provides an example of low frequency phase entrainment in a multisensory task in macaque V1 [56]. In this task, rhythmic stimuli entrain the phase of the ongoing delta rhythm and influence local spiking and synaptic population activity. This attention-dependent entrainment has behavioral consequences, reflected in decreased reaction times. Similar results were observed by Saleh and colleagues in human motor cortex [57]. These two tasks, examining different cortical areas, both show that rhythmicity in the external world impacts internal sensory and motor processing in an attention-dependent fashion.
