Abstract

We group encephalitic behaviors as shown in Table 1. It is striking that the majority of these behaviors, namely groups 1 and 2, help spread viral and bacterial infections underlying encephalitis, a situation similar to Ophiocordyceps unilateralis .Could some of the behaviors in Table 1 be of utility to the host as well? Note that the behavioral symptoms may not coincide with impaired intellect . Furthermore, these symptoms may be vestigial in the sense of having been of utility to the host species at a time when the latter possessed lower intelligence to begin with. It is also important to note that encephalitis is often triggered by physical and emotional stress, so that utility of behaviors is better assessed for such conditions.Continuous and compulsive exploration of one’s environment is of course a recipe for learning and discovery. Drinking, eating, biting, chewi ..