PSYCH 1XX3 Lecture Notes - Lecture 5: Extracellular Fluid, Excitatory Postsynaptic Potential, Neurotrophic Factors
27 Mar 2018
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Unit 1: introduction to the neural control of behaviour. Brain is made up of nearly 100 billion neurons and a typical cortical neuron can have between 1 and 10, 000 connections with other neurons. Neuron: the fundamental building block of the nervous system. Organized into signaling pathways to communicate via synaptic transmission. Dendrites reach out to other neurons and receive signals to be relayed through the dendritic branch to the cell body, where some signals will go on to be conveyed down the axon. Once a signal is received in the receptive zone, it is passed down the axon (varies in length) Each neuron can receive inputs from thousands of other neurons through dendrites and terminal boutons to form a network of information transfer. Cell membrane is selectively permeable, preferentially allowing certain ions to pass through it with various levels of ease. Cell membrane also contains a number of protein channels which act as passageways for ions to pass through.
