In some cases this may be because the mood change, although present, is less prominent than cyclical changes in activity, self-confidence, sociability, or appetitive behaviour.

But, as I argued there, the conscious appetitive behaviour of animals is more than enough to drive a significant wedge between the expression of their needs and the mere presence of those of plants and machines.

Organisms with a high inner motivational state for such a stimulus is called appetitive behavior.

In some cases this may be because the mood change, although present, is less prominent than cyclical changes in activity, self-confidence, sociability, or appetitive behaviour.

Appetitive behaviors are also partly controlled by medial preoptic area as aromatase-knockout mice show deficits in sexual motivation.

However, appetitive behaviors are disrupted by the lesions in rostral part rather than caudal part of medial preoptic area.

In addition, a continuous increase in vaginal sexual arousal may result in higher genital sensations and sexual appetitive behaviors.

To the Editor: While most explanations of obesity focus on external factors such as dietary choice or lack of exercise, an equally plausible explanation may be another appetitive behavior: sleep.

But, as I argued there, the conscious appetitive behaviour of animals is more than enough to drive a significant wedge between the expression of their needs and the mere presence of those of plants and machines.

In rats, lesions to mPOA can eliminate the male copulatory behavior but can only diminish appetitive behavior, which suggests that some other parts of the brain, except for mPOA, are also responsible for sexually appetitive behavior.