DRD2 and Alzheimer disease: All of our approaches combining in vivo D2/3R availabilityestimation, in vivo translational DA release measures, behavioural tests ofreactivity to stimulation of D2R and 5HT2AR, post-mortem densitymeasurements agree to conclude that DA dysfunction and alteration in5HT2AR−DA/D2R connectivity exist from the asymptomatic stages ofAlzheimer-like pathology in the TgF344-AD rat.