PSY 280 Lecture Notes - Lecture 5: Diffusion Mri, Evoked Potential, Artificial Neural Network
1 Feb 2017
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Document Summary
Overall brain volume, relative differences in size of specific structures, connectivity differences. Large system communication: serotonin, dopamine, adrenaline, and noradrenaline. Passing information from one neuron to another involves a number of steps. Action potentials travel down the axon to the terminal. Neurotransmitters then bind with specific proteins in the post-synaptic neuron. This binding increases (excitatory) or decreases (inhibitory_ the likelihood of an action potential. Synapse returns to neutral and neurotransmitter is removed. Information is encoded in action potentials (pattern of firing) Rdoc (positive affect, negative affect, cognition, social processes, regulatory systems) Basic systems of connections throughout the brain (100 billion neurons: 50-200 trillion connections) Planning, goal-setting, conflict monitoring, attentional control, inhibitory control, working memory. With roughly 200 trillion connections between neurons, understanding these. With roughly 200 trillion connections between neurons, understanding these connections on a neural level would be impossible. Solution: neural imaging (different techniques used to recored different types of cortical activity.
