01:119:116 Lecture Notes - Lecture 20: Excitatory Postsynaptic Potential, Inhibitory Postsynaptic Potential, Axon Hillock
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Memory and learning: c/c stm and ltm, seq, iov ltp. Synapse (cid:314) junction between synaptic terminal and another cell. Electrical (cid:314) current flows directly from cell to cell. Chemical (cid:314) involve neurotransmitters (see figure 48. 16) Synaptic cleft (cid:314) gap between synapse and postsynaptic cell, good for diffusion. Postsynaptic cell (cid:314) cell that receives signal. Synthesizes neurotransmitters that are stored in synaptic vesicles. Ap (cid:314) causes voltage-gated ca2+ channels to open (cid:314) ca2+ enters cell (cid:314) some vesicles fuse (cid:314) nts released. Acetylcholine (cid:314) muscle stimulation memory and learning. Dopamine (cid:314) level in brain affects mood. Change in membrane potential of postsynaptic cells. Triggered by ligand-gated ion channel (ligand (cid:314) something that binds: neurotransmitters in this case) Types of postsynaptic potentials (cid:314) see figure 48. 17. Often 100s of terminals to dendrite or cell body; all these signals must be put together. Postsynaptic potential (cid:314) based primarily on interactions, distance of terminal to hillock, [neurotransmitter]