PSYC23H3 Lecture Notes - Lecture 4: Glucocorticoid Receptor, Periventricular Nucleus, Mineralocorticoid Receptor
Document Summary
Psyc23 lecture 4: severe hunger (24-hr food-deprivation in drosophila) Threat detection done by the amygdala= threat detector: fear is elicited by amygdala and it detects threats that are fearful, patient sm: urbach wiethe disease, a congenital calcification of the amygdala bilaterally. Disease that prevents their amygdala from working= it gets calcified and they don"t hv an amygdala. Demonstrated approach behavior to spiders and snakes. The stress system: once the amygdala detects a threat, its outputs lead to the activation of a variety of target areas that control both behavioral and physiological responses designed to address the threat. In addition to the expression of defensive behaviors, such as freezing , amygdala activation leads to responses in the brain and the body that support the fear reaction. In the brain, monoaminergic systems are activated, resulting in the release of neurotransmitters such as ne, acetylcholine, serotonin, and dopamine throughout the brain.
