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20	20	== Prerequisites ==
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22		-To follow this tutorial, you need a basic knowledge of neuroscience (high-school level or greater). For example, you should know:
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24		-* The brain is made up of electrically excitable cells called neurons, which have long, narrow extensions called dendrites and axons.
25		-* Neurons have a voltage difference across their cell membrane due to differences in the concentration of sodium, potassium, calcium, chloride and other ions between the inside and the outside of the cell.
26		-* The neuron cell membrane contains many proteins that can open or close to allow diffusion of different ions, or can actively transport ions across the membrane; this can cause rapid changes in the voltage difference.
27		-* In general neurons receive signals from other neurons in their dendrites, and generate electrical pulses (large, rapid changes in the membrane voltage lasting a few milliseconds or less) called action potentials that travel down their axons to other neurons.
28		-* The connections between neurons are called synapses, and the most common type of synapse is the chemical synapse, at which the arrival of an action potential triggers the release of a chemical, called a neurotransmitter, from one neuron into the space between two neurons; this chemical then diffuses across this space, and binds to proteins called receptors on the other neurons; this binding then leads to movements of ions across the cell membrane, and hence to changes in membrane voltage.
29		-* Most neurons have a threshold voltage above which they will generate an action potential; most of the time, the membrane potential is below this level. When the voltage moves closer to this threshold we speak of "exciting" or "depolarising" the neuron; when the voltage moves away from this threshold, we speak of "inhibiting" or "hyperpolarising" the neuron.
30		-* Some neurotransmitters cause depolarisation, others hyperpolarisation.
31		-* In general, each synapse releases only one type of neurotransmitter, so we speak of "excitatory" or "inhibitory" synapses, depending on the effect of the neurotransmitter they release.
32		-* In general, all the synapses of a given type of neuron release the same neurotransmitter, therefore we speak of "excitatory" or "inhibitory" neurons.
33		-* Nervous systems are very complex, and most of the statements above are approximations, simplifications, or "general rules" with many exceptions!
34		-
35	35	== Format ==
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37		-This tutorial will be a video with slides and animations, but no code examples.
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39	39	== Script ==
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