Synapses Lecture Notes PDF
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These lecture notes cover various aspects of synapses, including the triggering events of action potentials, the speed of conduction along axons (myelinated and non-myelinated), and the role of neurotransmitters in synaptic communication. The notes also touch on summation, convergence, and divergence.
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Before, during, and after Synapse Size of triggering event on action potential Speed of action potential Synapses Post-synaptic neurons Before, during, and after Synapse Size of triggering event on action potential Speed of action potential Synapses Post-synaptic neuro...
Before, during, and after Synapse Size of triggering event on action potential Speed of action potential Synapses Post-synaptic neurons Before, during, and after Synapse Size of triggering event on action potential Speed of action potential Synapses Post-synaptic neurons Action potential – triggering event Remember: Triggering event causes all or none action potential (does not differentiate between different strengths of stimuli) Differentiating between different sizes of triggering events possible by frequency of action potentials over time (stronger stimulus results on greater number of action potentials/time, i.e. more reaching threshold potential) Before, during, and after Synapse Size of triggering event on action potential Speed of action potential Synapses Post-synaptic neurons Speed of Action Potentials along axon depends on: -Polling question- 1 1. Diameter of axon (larger faster than smaller) 2. Myelination (myelinated axon faster than unmyelinated) Unmyelinated axon Contiguous conduction ( one area gets the other area going) Myelinated axon Two types of glial cells acting as insulators *Schwann sell oliogodendrocyte Saltatory conduction Another view of Saltatory Conduction Two types of Conduction along an axon =contiguous conduction Before, during, and after Synapse Size of triggering event on action potential Speed of action potential Synapses Post-synaptic neurons Communicating with the next cell (synapse) Before, during, and after Synapse Size of triggering event on action potential Speed of action potential Synapses Post-synaptic neurons Summation, convergence, divergence Excitatory versus Inhibitory Synapses EPSP= excitatory post-synaptic potential IPSP= inhibitory post-synaptic potential Reality is much more complex! The post-synaptic cell - summation Summary: https://www.youtube.com/watch?v=LT3VKAr4roo Convergence and Divergence Brain’s main excitatory neurotransmitte Brains main inhibitory neurotransmitte
