PSY 105 Lecture Notes - Lecture 3: Functional Magnetic Resonance Imaging, Magnetic Resonance Imaging, Central Nervous System
8 Apr 2015
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All page numbers and figure references are from: lilienfeld, s. o. , lynn, s. j. , woolf, n. j. , Overview: the neuron, the brain, the nervous system, our genetic blue print. Structure of the neuron: our nervous system is made up of an estimated 100 billion neurons, with approximately. Action potential: when stimulated by signals from our senses or when triggered by chemical signals from neighboring neurons a neuron fires in what is known as an action potential (see figure. Neurotransmitters: the result of the action potential is that neurotransmitters are released into the synapse for relay to other neurons (see fig. 95-97 of your text discuss some of the more common neurotransmitters. We will learn more about neurotransmitters in chapter 5: graded potentials can be excitatory or inhibitory. If the excitatory inputs prevail over inhibitory inputs to reach a certain threshold, an action potential will occur.
