ABSTRACT
Finally, there are important connections between the limbic system and the hypothalamus (see Chapter 14, p. 276), providing routes by which olfactory stimuli can cause such obvious autonomic effects as salivation and other secretory responses to food smells, as well as influencing the choice of food: a single instance of particular odorant, associated with nausea even some hours later, can condition an animal to avoid the substance for the rest of its life. & Smell may also have much more widespread hormonal and behavioural effects, of which the best known are perhaps sexual arousal and modification of reproductive cycles, even abortion.
