“…MSNs also interact via lateral inhibitory connections (Burke, Rotstein, & Alvarez, ; Plenz, ). Studies have shown a role for parvalbumin‐positive fast spiking interneurons (FSIs), cholinergic interneurons, and low threshold spiking interneurons in movement and/or associative learning (Brown et al, ; Gittis, Leventhal, et al, ; Gritton et al, ; Holly et al, ; Lee, Finkelstein, Choi, & Witten, ; Lee et al, ; O'Hare et al, ; Owen, Berke, & Kreitzer, ). The function of other interneuron types, as well as MSN lateral inhibition, is less well understood.…”