PSY290H5 Lecture Notes - Lecture 5: Axon Hillock, Saltatory Conduction, Neurotransmitter Receptor
Document Summary
Chemical communication can be inhibitory (negative activity method with which we can scalp neural patterns) and excitatory (hyperpolarizes) both are equally important. Allows for a better follow of information in the brain. Basic excitatory connection (excitatory postsynaptic potential) depolarization of a neuron. Change of current inside of cell that is receiving information (postsynaptic) excitatory (depolarizing) potential (change in current) Input of 2 axons can add up for the neuron (opposite of action potential all or nothing). Spatial summation = contribution of more than one axon (must be connected to the same neuron). Temporal summation = if epsp or ipsp occur in rapid succession, they can add up over time. The succession of activity in close enough temporal proximity allow more channels to open up. Summing potentials that arrive at the axon hillock at different times, These potentials are transmitted from cell body all the way to another neuron. Simply reflect a great depolarizing stimulation to an axon.
