PSYCH 1XX3 Lecture Notes - Lecture 3: The Terminal, Neural Tube, Inhibitory Postsynaptic Potential
19 Apr 2020
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Unit 1: introduction to neuroscience: the brain, made up of approximately 100 billion neurons, and a typical cortical neuron can have between one and 10, 0000 connections with other neurons. Ions in the brain: cell membrane: selectively permeable (preferentially allowing different ions to pass through it with various levels of ease). This baseline imbalance is called the resting potential of the neuron: negatively charges large protein molecules within the neurons are so large that they cannot pass through the cell membrane. 70mv: under the influence of nearby neurons and random ion flow, a large enough change in the resting charge can occur to reach an important threshold level of - At this point, the action potential is triggered: the action potential, definition: the fundamental unit of communication for neurons. 50mv threshold is reached, a cascade of events is triggered: starts with the sodium channels along the cell membrane begin to open.
