Neural basis of motivation Flashcards
What is an error detector?
Creates an error signal when the value of the controlled variable does not match the set point
What is a set point?
Maintain a controlled variable within a certain range of desire value
How is controlled variable regulated i Drive reduction theory?
By a feedback dector and comparing the measured value with a desired value/set point
What are the two kinds of control to regulate body temperature?
Intrinsic physiological and Behavioural
What are the three thermoregulatory centres in the Hypothalamus?
- Preoptic region
- Anterior hypothalamic region
- Posterior hypothalmaic area
What occurs to warm neurons as temperature increases?
Firing rate increases
What occurs to cold neurons as temperature decreases?
Firing rate decreases
What is the purpose of satiety?
The absence of hunger
What is the set point theory for hunger and satiety?
The idea of a homeostatic, negative feedback system regulating feeding
What is the Yerkes-Dodson law (1908)?
A relationship between arousal and behavioural task perofrmance exists, such that there is an optimal level of arousal for an optimal performance
How is the Yerkes-Dodson law charterisized?
Inverted-U-shaped function
What does the Inverted-shaped reationshop between arousal and performance show?
The optimum level is higher in a simple task than in a complex task
What is the purpose of Locus Coeruleus (LC) in the brainstem reticular system?
Proivde the principal source of NE innervation to the entire cerebral cortex, hippocampus, amgdala and spinal cord
What is the Locus coreuleus under direct cotnrol of?
Structures responding to stress from the periphery via the vagus nerve and paraventricular neucleus of the hypothalamus
What are the differences between primary and seondary incentives?
Primary incentives are innate
Secondary incentives are learned
