Brain rhythms reflect synchronized activity across many neurons and thus provide a means for studying how groups of neurons coordinate their activity during complex cognitive functions such as learning. My work uses multisite tetrode and Neuropixels recordings from freely behaving animals to investigate how brain rhythms coordinate neuronal populations during learning and memory operations, particularly in the hippocampus and entorhinal cortex. Currently, my lab focuses on understanding how coordinated populations of neurons represent memories and understanding how disturbances in coordination of neuronal populations relates to learning and memory impairments in rodent models of learning disabilities and memory disorders.