Psychology

Eating
Eating behavior in human beings has been shown to be governed by ventromedial and lateral hypothalamus. Ventrimedial hypothalamus is commonly being referred to as satienty center. Eating behavior stops when it is stimulated, corresponding with a feeling of being satiated. Eating behavior on the other hand corresponds with the stimulation f the hypothalamus. When they are properly in operation, the two areas keep the body at particular body weight referred to as the set point.

Eating behavior is also subject to complex cognitive regulation. Dieting is one of the most common forms of cognitive control. This component of eating is mainly manipulated by an individual to achieve a particular end.

Substance Abuse
Substance abuse is a complex phenomenon that defies simple explanation. There is a web of interaction of factors that contribute to ones experimentation with, usage, and subsequent abuse of drugs. Regardless of this intertwining of contributing factors, the impacts and actions that drug abuse exerts underlie all substance abuse and addiction. Ones psychological makeup, biological response to drugs and environmental situation plays important roles in drug susceptibility. How these elements combine to result in substance abuse varies among people.

Drugs of abuse are given the positive reinforcing actions that provoke and support their continued use by the ability to induce activity in brain rewards systems. There is always the possibility that the outcome of taking a drug will maximize the behavior channeled toward seeking that drug.

Gender
Genes play a critical role in shaping human behavior. There are patters of behavior referred to as behavioral phenotypes that are often dependent on genotype. Human beings are born with innate behaviors so that they may instinctively respond to some environmental stimuli in a way that increases their prospects for survival. Genes play a critical role in complicated behavioral traits such as sexuality and gender differences.

Biological processes may impact on psychosexual orientation. There is often an element of influence exerted by testosterone on the development of the central nervous system. This may in turn impact on psychosexual orientation.

Men and women probably differ when it comes to psychological functioning. They differ in cognitive abilities especially with regard to the underlying cognitive processes and representations.

Personality Disorder
There are several unique psychological characteristics that people with personality disorder posses. Such include disturbances in self image, difficulty in having successful interpersonal relationships, appropriateness of an array of emotions, disturbances in how one perceives himself, others, and the world, and difficulty in having proper impulse control. The disturbances combine to establish a pervasive pattern of behavior and inner experience that is very different from the norms of ones culture.