This rendering from the Feng Lab highlights major neuromodulatory circuits in the mouse brain. Investigating these circuits in animal models may help us understand their human analogs. Courtesy of Guoping Feng Dec. 6, 2018 Facebook Twitter Reddit Print This rendering from the Feng Lab highlights major neuromodulatory circuits in the mouse brain. Investigating these circuits in animal models may help us understand their human analogs. Courtesy of Guoping Feng