Motivation and the Brain Essay

1386 Words Apr 13th, 2012 6 Pages
Motivation and The Brain
Malisha Mishoe
PSY 355
January 9, 2011
Dr. Peters

Motivation and The Brain
Motivation and the Brain
Motivation is at its core potential in nature, only finding a kinetic outlet when behavior is facilitated. Motivation can be liken to a large boulder being suspended on a hill by the small, wooden peg of choice. The boulder stores only potential energy while withheld on top of the hill, but by acting upon the small, wooden peg of choice motivation can be translated into kinetic energy—behavior (i.e. the boulder rolling down the hill). Achievement motivation theory dictates that incentive value, the attractiveness of an incentive as determined by number or amount, is mediated by the tendency to succeed (Ts)
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However, it was quickly realized that the hyperplasia of rats with lesioned VMH were only temporary, resulting in nothing more than an eventual higher static, set-point body weight. It has been suggested that the new set-point is due to the instrumental role that the VMH and LH play in the regulation of adipose tissue accumulation. It is also necessary to note that lesions to the VMH and LH damage the paraventricular nuclei and the ventral noradrenergic bundle, which contribute to blood glucose management. The VMH and LH seem to regulate adipose tissue concentrations in the body, which in turn moderate the sensations of hunger and satiety through the medium of blood glucose levels. In sum, the hypothalamus regulates the conversion of energy into fat, thereby creating an incentive for increased caloric intake when sections of the hypothalamus are lesioned. Coached in motivational psychology terms, the hypothalamus controls the physiological need for energy, through the psychological drive for hunger, by controlling the rate of fat storage.
Intrinsic and Extrinsic Factors
The objective incentive value, or physical properties of an incentive, differs from the utility, the subjective pleasure or usefulness of an incentive, as to the satisfaction rendered. For instance, the economic cost of food does not always translate into increased

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