Sensory effects appetite

Serotonin (5HT) affects sleep, temperature, sexual behavior, sensory perception, appetite, and mood. There are many serotonin receptors, and activation of each brings about different effects. LSD and psilocybin activate serotonin receptors. 

Gormezano, I., Harvey, J. A., and Aycock, E. (1980) Sensory and associative effects of LSD on classical appetitive conditioning of the rabbit jaw movement response. Psychopharmacology, 70 137-143. 

Heightened sensory perceptions Stimulates appetite Perceived slower passage of time Panic or anxiety Dissociative symptoms Physiological Effects Increases heart rate Reduces body temperature Slowed gastrointestinal function Electrophysiology... 

The studies reviewed above indicate that experiences can have short-term effects upon food preferences and long-term effects upon food rejection. They do not, however, provide support for presumptions that early exposure to excessive sweets, for example, will create a sensory addiction in an organism. Instead, the sweet preferences shown by many species Including humans appear to be present at birth (95). Likewise, sodium chloride detection and the sodium appetite and the rejections of sour and bitter stimuli appear to be built-in, adaptive response tendencies which derive from sensory hedonlcs (96). Conditioned food aversions, though seemingly representing a rather... 

---