PSYC3338 Lecture Notes - Lecture 4: Senile Plaques, Theodor Meynert, Basal Ganglia
Document Summary
We have 4 diffuse modulatory systems that use 4 different nt"s. But, these have widespread connections across the brain and modulate brain activity. All work together and even modulate each other in ways that we don"t really understand! Diffuse modulatory systems are the backdrop against which all other more specific activity occurs. You are in a different brain state right now than you were the last time you sat in this classroom. You may be in a whole different mood. Too much/little nts being released into the synaptic cloud. Many different ways the synapses might be altered by genetics/learning/trauma to. Change the backdrop for your precise sensory and motor function. Diffuse modulatory system takes sensory input and takes it somewhere else. Someone psychotic might have perfectly normal sensory input but may see something totally different. Produce norepinephrine (ne) which is activated by unexpected, non-painful stimuli. Neurons fan out to innervate sensory structures to regulate sensory input.
