Emotion and Motivation Flashcards
what is the lateral hypothalamus linked to?
it is linked to hunger / orexigenic, and can excite / produce eating.
what is the ventromedial nucleus linked to?
it is linked to satiety / anorexigenic, and can inhibit / reduce eating.
what is leptin?
it is a hormone produced by fat and can in turn reduce fat.
what does leptin do?
it is linked to the arcuate nucleus in the hypothalamus, which is further linked to the lateral hypothalamus (in an inhibitory way) and then the paraventricular nucleus (in an excitatory way) – this means eating is inhibited.
hunger inducing neurons activate what system?
the parasympathetic nervous system.
what happens when the hunger neurons activate the parasympathetic nervous system?
it inhibits / reduced the metabolic rate.
satiety inducing neurons activate what system?
the sympathetic nervous system.
what happens when the satiety neurons activate the sympathetic nervous system?
it excites / increases metabolic rate.
what does the lateral hypothalamus and the ventromedial nucleus having glucose receptors mean?
high blood glucose – inhibit the hunger centre / lateral hypothalamus, and activate the satiety centre / ventromedial nucleus.
how does insulin relate to the hunger and satiety centres?
the presence of insulin activates the satiety centres and inhibits the hunger centres.
what is ghrelin?
a hunger inducing hormone.
what happens when the stomach is full?
ghrelin is not produced.
the amygdala is activated when?
viewing fearful faces.
what did animal studies that lesioned the amygdala show?
animals will show less fear.
dopaminergic projections in the mesocorticolimbic pathway are important in what?
coding rewards.