Saccade amplitudes are increased by firing more motor neurons in relevant cranial nerves and by increasing the durations of their firing. Consistent with this model,

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Quizplus · Accepted Answer

According to the model, increasing the firing of motor neurons and their durations leads to larger saccade amplitudes, which in turn translates to higher peak velocities. Therefore, saccade peak velocities are expected to increase with saccade amplitudes.

Saccade Amplitudes Are Increased by Firing More Motor Neurons in Relevant