PSYC 207 Lecture Notes - Lecture 8: Inhibitory Postsynaptic Potential, Excitatory Postsynaptic Potential, Psps Pekanbaru
Document Summary
When a neurotransmitter molecule binds to a receptor it has one of two effects: Depolarize the membrane (decrease the membrane potential from -70 to -67mv) Aka excitatory postsynaptic potential (happens on the dendrites and excites the membrane) = increase likelihood of firing of action potential. Hyperpolarize the membrane (increase the membrane potential from -70 to - Aka inhibitory postsynaptic potential = decreases the likelihood of firing action potential. Transmission of postsynaptic potential (psps) is graded (different shapes), rapid, and decremental (the charge fades away the farther it is from the initial impact site), psps travel like an electrical signal along an uninsulated wire. Epsps and ipsps sum both spatially and temporally. If the charges occur at the same time they produce a larger charge = a larger sum . You need a bunch of epsps to cause anything over space or over time,
