First, to corroborate the previous results, we infected the VPL bilaterally with the virus rAA5/CamKIIa-eNPHR3.0 to express Halorhodopsin or the virus rAA5/CamKIIa-eArchT3.0 to express Archaerhodopsin and implanted optical fibers over the site of infection in the VPL (two animals) or its terminals in the DLS (two animals) (Fig. 7a). Here, CAMK2A is linked to infection.