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p.2843 right column top & 2nd paragraph: "A. Neural modeling methods: The model MSO neuron in the computational simulation is defined by its cell and membrane parameters, its input and synaptic parameters, and the acoustic stimuli assumed to drive its inputs. Basic data analysis methods are also defined, and parameter values of the model MSO neuron are provided in Tables II and III. 1. Cell model: The model MSO neuron is based on existing multicompartment Hodgkin-Huxley models for a principal MSO neuron and its ion-channel dynamics (primary sources) with modifications from the primary source Zhou et al. (2005) model described below. The four cylindrical compartments of the model comprise a contralateral dendrite, ipsilateral dendrite, soma, and axon. The two dendrites connect to opposite ends of the soma, and in this study the axon connects to the ipsilateral half of the soma (at 75% of the distance along the soma from its contralateral to ipsilateral end). While the model is used to estimate human ITD [interaural time difference] thresholds, it is based on the physiology of ITD-sensitive MSO neurons in the Mongolian gerbil. To be conservative in predicting a loss in ITD sensitivity at higher frequencies, model parameters were chosen to match or be slightly faster than those measured in the gerbil." |