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George E. Carvell, PhD, PT   University of Pittsburgh
 
LOCAL POTENTIALS VI: SYNAPTIC POTENTIALS Synaptic Integration Movie
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Fig 5.17
 p. 121
Movie shows simultaneous inputs to a number of synaptic spines on many branches of the dendritic tree (orange glows). This synchronous input results in a spatiotemporal integration of EPSPs.The soma depolarization is suprathreshold and an Action Potential is initiated at the axon hillock at the base of the pyramid. The AP is propogated down the myelinated axon in a saltatory fashion (bright flashes).
a = Unitary EPSP (rarely occurs in intact brain)
c = Temporal Summation of EPSPs
b = Spatial Summation of EPSPs
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GMOMM  2001