updates

S2/Neuro/VL/NeuroVL3.typ

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+// Main VL Template
+#import "../preamble.typ": *
+ 
+#show: conf.with(
+	// May add more flags here in the future
+	num: 3
+)
+
+= Synapses
+
+The synapses are the connection between two neurons.
+
+The transportation of the signal goes in three stages $"chemical" -> "electrical" -> "chemical"$.
+
+Chemical synapses are very common for learning.
+
+There are different neurotransmitters.
+Where as GABA is the most present inhibitory transmitter (it makes the AP more negative).
+Glutamate is the most relevant exititory transmitter.
+Glycine is also inhibitory. 
+NMDA is a chemical agonist. It opens just certain channels.
+
+The presynaptic signal does depolarize the other cell to be positive.
+
+The reversal potiential does start when you open all the channels it is usually plus 30.
+
+Q: What is LTP?
+
+Synapses are used to trasmit signals from the axon of a source to the dendrite of a target neuron. 
+
+There are electrical and chemical synases. 
+At an electrical synapse we have direct electrial coupling 
+At a chemical synapse a chemical subastanse is used to trasport the signal.
+
+Electrical synapses operate bi -directional and are extremely fast.
+
+
+AP creates a negative calcium current which are opeing the cages for the transmitters.
+
+EPSP and IPSP
+
+General reduction of the Hodgkin-Huxley Model
+
+2 dimensioanl Neuron Models
+
+$
+	tau (dif u) / (dif t) = F (u,w) + I (t) \
+	tau_(w) (dif w) / (dif t) =  G (u,w)
+$
+where $I (t)$ is a Stimulus.
+
+This leads to the following equations where $beta and gamma$ are constants.
+$ (dif u) / (dif t) =  u - (u^3 ) / (3) - w + I \
+(dif w) / (dif t) =  epsilon (u +  beta - gamma w) \
+$
+
+An introductionary example is the harmonix Oscillator (already did this in physics class).
+
+The crossing of the nullclines show the fixpoints.
+
+Van der Pol differential equations.
+