Estimating the Time Course of Population Excitatory Postsynaptic Potentials in Motoneurons of Spastic Stroke Survivors 2 Running Title: Prolonged Epsp Time Course in Stroke Article Type: Rapid Reports Sensory Motor Performance Program

21 Hyperexcitable motoneurons are likely to contribute to muscle hypertonia after a stroke 22 injury; however, the origins of this hyperexcitability are not clear. One possibility is that the 23 effective duration of the Ia excitatory postsynaptic potential (EPSP) is prolonged, increasing the 24 potential for temporal summation of EPSPs, making action potential initiation easier.

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